Crime, Mystery & Thriller Series Continued by Other Authors

Find out who continued a crime, mystery or thriller series, with which book, and whether the later books were new stories or completed unfinished manuscripts. Search by series title, original author or later writer. Each entry gives the short answer and, where needed, a handover timeline.

This index covers crime, mystery and thriller series I have researched so far. It is not meant to include every series ever published. It also focuses on series that actually changed writers, so a famous author’s name appearing on a later standalone book does not automatically make it a series continuation.

About this index: This index is researched and maintained by Marika, founder of Mystery Sequels. Each record has its own factual verification date and a private source trail. Mystery Sequels is independent of the authors, estates and publishers listed. Noticed an error or a missing series? [Report a correction].

How to use this index

In this index, a handover is a general term for a confirmed change in who wrote, completed or continued a series. It does not always mean that one author officially replaced another.

A handover simply means that the writing of a series changed in some way. Sometimes another author took over completely. Sometimes someone finished one last book, joined the original writer for a transition, or wrote only a few later books.

What the basic information means

  • Original creator: The writer or writing team that created the series. This may be different from the name printed on the books if a shared pen name was used.
  • First change: The first confirmed point where the writing arrangement changed. This is not necessarily the year the original author died.
  • Current writer or writers: The person or people actually writing the series now. The original author’s name may still appear on the cover even when someone else writes the books.
  • Announced next writer: A writer officially named for a future book who has not yet begun that part of the series.
  • Last verified: The date when the facts in that individual record were last checked.

What the series status means

  • Continuing: New books are being published or officially announced.
  • Complete: Reliable sources identify the series as finished, or the known continuation ended with a final work.
  • No new continuation announced: No further continuation is currently confirmed. This does not mean the series has officially ended.
  • Status not confirmed: The available evidence does not yet make it clear whether the series is continuing, complete or simply has no new continuation announced.

What the handover labels mean

The filter uses short labels to make the different kinds of handover easier to browse.

  • Unfinished material completed: Another writer finished a book or other material left incomplete by the original author. They did not necessarily continue the series afterward.
  • Completed, then continued: A later writer first finished material left by the original author and then wrote new books in the series.
  • Chosen by original author: The original creator chose the later writer. If the evidence only shows approval rather than personal selection, the individual record uses more cautious wording.
  • Co-written during handover: The original writer and later writer worked together during the changeover before the later writer took on a larger or sole role.
  • One original writer continued: A series originally written by two or more people continued with one member of the original writing team.
  • Family member continued: A relative of the original author continued the series.
  • One later author: One later writer continued the series.
  • Several later authors: The series passed from one later writer to another over time.
  • Different writers over time: Separate writers were brought in for different books or periods without one permanent successor.
  • Publisher multiwriter model: A publisher manages the series using several writers rather than one continuing author.
  • Author-supervised writers: Other writers drafted or contributed books while the original author remained involved in planning, supervision or editing.
  • New prequel books: Later writers added new stories set before the original series.
  • Limited later books: Only one or a small number of later books were added.
  • Publisher-recognized: The publisher treats the later books as part of the established series, but the available evidence does not clearly explain who selected or authorized the later writer.
  • New-generation continuation: The later books keep the same fictional world or family but move the story to descendants or another generation.

Search the Series Handover Index

Browse who created each series, how its authorship changed, and who writes it now.

A7 series

A.J. Raffles

Original creator: E.W. HornungHandover: Continued by one later authorStatus: No new continuation announced

First change: 1933 - Raffles After Dark

Barry Perowne, the pen name of Philip Atkey, received permission from E.W. Hornung's executors to write new Raffles fiction. Beginning with Raffles After Dark in 1933, he produced a sustained authorized continuation programme decades before modern literary estates routinely commissioned successors.

Last verified: August 25, 2026

View handover timeline
  1. 1933 - Barry Perowne was appointed to continue with Raffles After Dark.

Agatha Raisin

Original creator: M.C. BeatonHandover: Successor chosen by the original authorStatus: Continuing

First change: 2019 - Hot to TrotCurrent writer: R.W. Green

M.C. Beaton chose R.W. Green to continue Agatha Raisin while her health was failing. Green now continues the series, while current books retain the public credit 'M.C. Beaton with R.W. Green.'

Last verified: August 25, 2026

View handover timeline
  1. 2019 - M.C. Beaton began a planned handover to R.W. Green. Hot to Trot was the first book in the transition.

Albert Campion

Original creator: Margery AllinghamHandover: Unfinished material was completed, then the series continuedStatus: Continuing

First change: 1968 - Cargo of EaglesCurrent writer: Mike Ripley

Philip Youngman Carter first completed Margery Allingham material and then wrote new Campion fiction. After Carter later died leaving unfinished Campion material, Mike Ripley completed that work and continued the series again.

Last verified: August 25, 2026

View handover timeline
  1. 1968 - Philip Youngman Carter completed Cargo of Eagles from unfinished Margery Allingham material, then continued with new fiction.
  2. 2014 - Mike Ripley completed Mr Campion’s Farewell from unfinished Philip Youngman Carter material, then continued with new fiction.

Alex Hawke

Original creator: Ted BellHandover: Continued by one later authorStatus: Continuing

First change: 2025 - Ted Bell's MonarchCurrent writer: Ryan Steck

Ryan Steck continued Ted Bell's Alex Hawke series after Bell's death. Steck's first Hawke novel, Monarch, used Bell's plot outline and notes; Warmonger is Steck's second continuation novel.

Last verified: August 25, 2026

View handover timeline
  1. 2025 - After Ted Bell died, Ryan Steck continued with Ted Bell's Monarch.

Amelia Peabody

Original creator: Elizabeth PetersHandover: Unfinished material was completedStatus: Complete

First change: 2017 - The Painted Queen

Joan Hess completed Elizabeth Peters's unfinished final Amelia Peabody novel, The Painted Queen. Hess did not take over the series for further novels.

Last verified: August 25, 2026

View handover timeline
  1. 2017 - Joan Hess completed Elizabeth Peters's unfinished The Painted Queen.

Archy McNally

Original creator: Lawrence SandersHandover: Continued by one later authorStatus: No new continuation announced

First change: 1999 - McNally's Dilemma

Vincent Lardo continued Lawrence Sanders's Archy McNally series after Sanders's death. McNally's Dilemma appeared under Sanders's name in 1999, while later books such as McNally's Folly were openly credited to Lardo.

Last verified: August 25, 2026

View handover timeline
  1. 1999 - Vincent Lardo took over writing the series with McNally's Dilemma, although the book still carried Lawrence Sanders's name.
  2. 2000 - McNally's Folly was the first book openly credited to Lardo.

Arsène Lupin

Original creator: Maurice LeblancHandover: Only a few later books were addedStatus: No new continuation announced

First change: 1973 - Le Secret d’Eunerville

Boileau-Narcejac wrote a five-novel Arsène Lupin continuation beginning with Le Secret d’Eunerville in 1973. Current Hachette material explicitly presents the duo as continuing Maurice Leblanc’s legendary hero.

Last verified: August 25, 2026

View handover timeline
  1. 1973 - Pierre Boileau and Thomas Narcejac began a publisher-recognized continuation with Le Secret d’Eunerville.
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B6 series

Baantjer / De Cock

Original creator: A.C. BaantjerHandover: Continued by one later authorStatus: Continuing

Original public credit: Baantjer

First change: 2012 - De Cock en de onzichtbare moordenaarCurrent writer: Peter Römer

A.C. Baantjer wrote the De Cock series through Book 70. Peter Römer continued it after Baantjer's death: Books 71-75 were based on scripts from the Baantjer television series, and from De Cock en de dode diva (#76) he began writing wholly new De Cock stories under the continuing Baantjer brand.

Last verified: August 25, 2026

View handover timeline
  1. 2012 - Peter Römer began a book continuation using screen-derived material with De Cock en de onzichtbare moordenaar.
  2. 2015 - Peter Römer began writing original continuation fiction with De Cock en de dode diva.

Bess Crawford

Original creators: Caroline Todd, Charles ToddHandover: One of the original writers continued aloneStatus: Continuing

Original public credit: Charles Todd

First change: 2027 - A Deadly CostAnnounced next writer: Charles Todd

Caroline and Charles Todd wrote the Bess Crawford series together under the shared name Charles Todd. Caroline died in 2021, but The Cliff's Edge (2023) remained a joint work. Charles Todd is announced to continue the series alone with A Deadly Cost, due March 2, 2027, under the unchanged shared name.

On Mystery Sequels: Charles Todd

Sources
  • A Deadly CostPublisher page confirming A Deadly Cost as Bess Crawford #14, by Charles Todd, due March 2, 2027.
  • Q&A with Charles ToddCharles Todd explains that he and Caroline co-authored the earlier books and discusses beginning the next Bess Crawford novel after her death.

Last verified: September 5, 2026

View handover timeline
  1. 2027 - Charles Todd was announced as the sole writer of A Deadly Cost, a Bess Crawford novel due in 2027, following Caroline Todd's death.

Bingo Riggs and Handsome Kusak

Original creator: Georgiana Ann Randolph CraigHandover: Unfinished material was completedStatus: Complete

Original public credit: Craig Rice

First change: 1958 - The April Robin Murders

Craig Rice died leaving The April Robin Murders unfinished. Ed McBain completed the manuscript, producing the third and final Bingo Riggs and Handsome Kusak novel; he did not continue the series beyond that book.

Last verified: August 25, 2026

View handover timeline
  1. 1958 - Ed McBain completed Craig Rice's unfinished The April Robin Murders.

Blackshirt

Original creator: Graham Montague JeffriesHandover: Continued by a family memberStatus: No new continuation announced

Original public credit: Bruce Graeme

First change: 1952 - Concerning Blackshirt

Bruce Graeme handed Blackshirt to his son Roderic Jeffries in 1952. Writing as Roderic Graeme, Roderic began with Concerning Blackshirt and wrote twenty Blackshirt books through 1969.

Last verified: August 25, 2026

View handover timeline
  1. 1952 - Graham Montague Jeffries as Bruce Graeme began a planned handover to Roderic Jeffries as Roderic Graeme. Concerning Blackshirt was the first book in the transition.

Blackwell Family / Master of the Game

Original creator: Sidney SheldonHandover: Only a few later books were addedStatus: No new continuation announced

First change: 2009 - Sidney Sheldon's Mistress of the Game

Tilly Bagshawe continued Sidney Sheldon's Blackwell family story with Sidney Sheldon's Mistress of the Game in 2009. It is a direct sequel to Master of the Game and part of the wider Sheldon-family legacy arrangement.

Last verified: August 25, 2026

View handover timeline
  1. 2009 - Tilly Bagshawe was appointed to continue with Sidney Sheldon's Mistress of the Game.

Bulldog Drummond

Original creator: H.C. McNeileHandover: Unfinished material was completed, then the series continuedStatus: No new continuation announced

Original public credit: Sapper

First change: 1938 - Bulldog Drummond on Dartmoor

After H.C. McNeile ('Sapper') died in 1937, his friend Gerard Fairlie continued Bulldog Drummond in accordance with McNeile's wishes. Bulldog Drummond on Dartmoor used a plot the two men had discussed, after which Fairlie wrote new Drummond novels through 1954. H. R. F. Keating later wrote two screen-derived Drummond film novelizations as Henry Reymond.

Last verified: August 26, 2026

View handover timeline
  1. 1938 - Gerard Fairlie completed Bulldog Drummond on Dartmoor from an unfinished H.C. McNeile manuscript, then continued the series with new fiction.
  2. 1967 - H. R. F. Keating, writing as Henry Reymond, wrote the screen-derived novelization Deadlier Than the Male.
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C5 series

Capital Crimes

Original creator: Margaret TrumanHandover: Continued by several authorsStatus: No new continuation announced

First change: 2012 - Margaret Truman's Experiment in Murder

Donald Bain later acknowledged writing 27 Capital Crimes novels, most originally published only under Margaret Truman's name. After Truman's death he became openly credited on the series, and Jon Land later continued it with Murder on the Metro and Murder at the CDC.

Last verified: August 25, 2026

View handover timeline
  1. 2012 - Donald Bain became openly credited on the series with Margaret Truman's Experiment in Murder after years of involvement behind Truman's byline.
  2. 2021 - Jon Land took over from Donald Bain with Margaret Truman's Murder on the Metro.

Captain Heimrich

Original creators: Richard Lockridge, Frances LockridgeHandover: One of the original writers continued aloneStatus: No new continuation announced

First change: 1964 - Murder Can’t Wait

Richard and Frances Lockridge wrote the Captain Heimrich mysteries together until Frances died in 1963. Richard then continued Heimrich alone, beginning with Murder Can’t Wait in 1964.

Last verified: August 25, 2026

View handover timeline
  1. 1964 - Richard Lockridge continued alone from Murder Can’t Wait after Frances Lockridge died.

Colonel Alistair Granby

Original creators: John Leslie Palmer, Hilary St George SaundersHandover: Unfinished material was completedStatus: Complete

Original public credit: Francis Beeding

First change: 1946 - There Are Thirteen

John Palmer and Hilary St George Saunders wrote the Granby novels together as Francis Beeding. After Palmer died in 1944, There Are Thirteen appeared in 1946 under the same name; crime-fiction reference sources attribute completion of the final novel to Saunders.

Last verified: August 26, 2026

View handover timeline
  1. 1946 - Hilary St George Saunders completed the final Francis Beeding Granby novel, There Are Thirteen, after co-creator John Leslie Palmer's death.

Commander George Gideon

Original creator: John CreaseyHandover: Continued by one later authorStatus: No new continuation announced

Original public credit: J.J. Marric

First change: 1978 - Gideon's Force

John Creasey wrote the Gideon police procedurals as J.J. Marric. After Creasey's death, William Vivian Butler continued the series under the same J.J. Marric name, beginning with Gideon's Force in 1978 and writing five further novels through 1990.

Last verified: August 25, 2026

View handover timeline
  1. 1978 - After John Creasey's death, William Vivian Butler continued Commander George Gideon as J.J. Marric with Gideon's Force.

Covert-One

Original creator: Robert LudlumHandover: Different writers were brought in over timeStatus: No new continuation announced

Original public credit: Robert Ludlum with collaborators

First change: 2001 - The Cassandra Compact

Robert Ludlum and Gayle Lynds created the Covert-One series together for The Hades Factor, followed by a Ludlum/Philip Shelby collaboration on The Cassandra Compact. After Ludlum's death, Lynds continued under joint Ludlum credit before the series adopted an explicit 'Series Created by Robert Ludlum, Written by...' model and later rotated among commissioned writers.

Last verified: August 25, 2026

View handover timeline
  1. 2001 - Philip Shelby replaced Gayle Lynds as collaborator, beginning with The Cassandra Compact.
  2. 2002 - After Robert Ludlum's death, Gayle Lynds continued Covert-One with The Paris Option under the existing joint Ludlum credit.
  3. 2004 - With The Lazarus Vendetta, Covert-One adopted an explicit credit naming Robert Ludlum as series creator and Patrick Larkin as writer.
  4. 2007 - With The Arctic Event, the rights holder changed how writers were commissioned.
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D4 series

Daniel Pitt

Original creator: Anne PerryHandover: Unfinished material was completedStatus: Complete

First change: 2026 - Death Times Seven

Anne Perry left a full outline and about half of a draft for the seventh Daniel Pitt novel. Victoria Zackheim completed Death Times Seven, published in 2026 as the final book in the series.

On Mystery Sequels: Anne Perry

Last verified: August 25, 2026

View handover timeline
  1. 2026 - Victoria Zackheim completed Anne Perry's unfinished Death Times Seven.

De Schaduw / Havank

Original creator: Hans van der KallenHandover: Unfinished material was completed, then the series continuedStatus: No new continuation announced

Original public credit: Havank

First change: 1964 - Menuet te middernacht

After Havank died, Pieter Terpstra completed the novel he was writing and two additional starts, then wrote a long run of new Schaduw adventures as Havank+Terpstra. Tomas Ross revived the series again as Havank Ross in 2008. A separate 1984 reconstruction by Sef Passage shows that archival creator material could surface alongside the main succession line.

Last verified: August 25, 2026

View handover timeline
  1. 1964 - Pieter Terpstra completed Havank's unfinished Menuet te middernacht.
  2. 1965 - Pieter Terpstra completed Havank's unfinished De Erven Mateor.
  3. 1967 - After completing unfinished Havank material, Pieter Terpstra continued De Schaduw with new fiction beginning with Schaduw achter tralies.
  4. 1984 - Sef Passage completed De zilveren hazewind from material begun by Havank.
  5. 2008 - Tomas Ross revived the series after a long gap with Caribisch complot.

Dirk Pitt

Original creator: Clive CusslerHandover: Continued by a family memberStatus: Continuing

First change: 2004 - Black WindCurrent writer: Dirk Cussler

Dirk Cussler coauthored eight Dirk Pitt novels with his father Clive Cussler before becoming the sole continuing writer after Clive Cussler's death.

Last verified: August 25, 2026

View handover timeline
  1. 2004 - Dirk Cussler joined Clive Cussler as co-writer with Black Wind.
  2. 2021 - Dirk Cussler became sole continuation writer with Clive Cussler's The Devil's Sea, after previously writing with Clive Cussler.

Dr. Palfrey / Z5

Original creator: John CreaseyHandover: Continued with a new generation of charactersStatus: No new continuation announced

First change: 2012 - Eternity's Sunrise

John Creasey's son Richard returned to the Z5 world in 2012, but he did not simply inherit Dr. Palfrey as the same lead. His stories center on Thomas Palfrey, the original doctor's grandson, making this a next-generation continuation of the organization and fictional family rather than a straightforward protagonist handover.

Last verified: August 25, 2026

View handover timeline
  1. 2012 - Richard Creasey continued the Dr. Palfrey / Z5 world through a new generation with Eternity's Sunrise.
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E3 series

Ellery Queen

Original creators: Frederic Dannay, Manfred B. LeeHandover: Original author supervised other writersStatus: Complete

Original public credit: Ellery Queen

First change: 1963 - The Player on the Other Side

Frederic Dannay and Manfred B. Lee created Ellery Queen and published under that shared identity. In the 1960s they brought outside writers into actual Ellery Queen detective novels while retaining plotting and editorial control, so the byline stayed the same even though the person drafting the novel could change. The character series ended with the original team rather than becoming a posthumous successor franchise.

Last verified: August 25, 2026

View handover timeline
  1. 1963 - Theodore Sturgeon drafted The Player on the Other Side from a detailed Frederic Dannay outline under the Ellery Queen team's supervision.
  2. 1964 - Avram Davidson drafted And On the Eighth Day after Theodore Sturgeon's contribution, under the Ellery Queen team's continuing control.
  3. 1966 - Paul W. Fairman wrote the screen-derived novelization A Study in Terror, with framing material supplied by the Ellery Queen team.

Eugenia Potter

Original creator: Virginia RichHandover: Unfinished material was completed, then the series continuedStatus: Complete

First change: 1993 - The 27-Ingredient Chili Con Carne Murders

Nancy Pickard was asked to complete Virginia Rich’s unfinished fourth Eugenia Potter mystery from drafts and notes, then wrote two more Potter novels. At least one later book also drew on Rich’s surviving notes.

Last verified: August 25, 2026

View handover timeline
  1. 1993 - Nancy Pickard completed The 27-Ingredient Chili Con Carne Murders from unfinished Virginia Rich material, then continued with new fiction.
  2. 1998 - Nancy Pickard continued with The Blue Corn Murders, drawing on surviving Virginia Rich notes.

Ewert Grens / Piet Hoffmann

Original creators: Anders Roslund, Börge HellströmHandover: One of the original writers continued aloneStatus: Complete

Original public credit: Roslund & Hellström

First change: 2018 - Three Hours

Anders Roslund and Börge Hellström created Ewert Grens and Piet Hoffmann together. After the partners mutually ended their writing partnership, Roslund continued the same characters alone from Three Hours in 2018; their final joint adventure appeared in 2025.

Last verified: August 25, 2026

View handover timeline
  1. 2018 - Anders Roslund continued alone from Three Hours after Börge Hellström left the series.
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F2 series

Fantômas

Original creators: Pierre Souvestre, Marcel AllainHandover: One of the original writers continued aloneStatus: Complete

First change: 1926 - Fantômas est-il ressuscité ?

Pierre Souvestre and Marcel Allain created Fantômas together. After Souvestre died in 1914, Allain eventually revived the series alone in 1926 with Fantômas est-il ressuscité ? and continued writing new Fantômas fiction for decades.

Last verified: August 25, 2026

View handover timeline
  1. 1926 - Marcel Allain continued alone from Fantômas est-il ressuscité ? after Pierre Souvestre died.

Fu Manchu

Original creator: Sax RohmerHandover: Continued by several authorsStatus: Continuing

First change: 1984 - Ten Years Beyond Baker StreetCurrent writer: William Patrick Maynard

The Sax Rohmer estate licensed Cay Van Ash to write new Fu Manchu fiction beginning with Ten Years Beyond Baker Street. William Patrick Maynard later became the second licensed continuation author; his third Fu Manchu novel, The Triumph of Fu Manchu, received its first publication in 2026.

Last verified: August 26, 2026

View handover timeline
  1. 1984 - Cay Van Ash was appointed to continue with Ten Years Beyond Baker Street.
  2. 2009 - William Patrick Maynard became the second licensed Fu Manchu continuation author with The Terror of Fu Manchu, a novel set earlier in the series chronology.
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G1 series

George Smiley / The Circus

Original creator: John le CarréHandover: Continued by a family memberStatus: Continuing

First change: 2024 - Karla's ChoiceCurrent writer: Nick Harkaway

John le Carré's son Nick Harkaway returned to George Smiley's world with Karla's Choice in 2024. A second new Smiley/Circus novel, The Taper Man, is due in November 2026, making this an active family- and estate-backed continuation rather than a one-off tribute.

Last verified: September 5, 2026

View handover timeline
  1. 2024 - Nick Harkaway continued after John le Carré, beginning with Karla's Choice.
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H4 series

Hamish Macbeth

Original creator: M.C. BeatonHandover: Successor chosen by the original authorStatus: Continuing

First change: 2022 - Death of a Green-Eyed MonsterCurrent writer: R.W. Green

M.C. Beaton chose R.W. Green to continue Hamish Macbeth while she was still alive. Green now writes the continuing series, whose books remain publicly credited to 'M.C. Beaton with R.W. Green.'

Last verified: August 25, 2026

View handover timeline
  1. 2022 - M.C. Beaton began a planned handover to R.W. Green. Death of a Green-Eyed Monster was the first book in the transition.

Harlem Detectives

Original creator: Chester HimesHandover: Unfinished material was completedStatus: Complete

First change: Plan B

Chester Himes left Plan B unfinished. Michel Fabre and Robert E. Skinner completed the final Harlem Detectives novel from Himes's notes; they did not take over Coffin Ed Johnson and Grave Digger Jones for a new continuation series.

Last verified: August 25, 2026

View handover timeline
  1. Year not confirmed - Michel Fabre and Robert E. Skinner completed Chester Himes's unfinished Plan B.

Hercule Poirot

Original creator: Agatha ChristieHandover: Continued by one later authorStatus: Continuing

First change: 2014 - The Monogram MurdersCurrent writer: Sophie Hannah

The Agatha Christie Estate approved Sophie Hannah to write new Hercule Poirot novels beginning with The Monogram Murders in 2014. The official Christie site now identifies six Poirot continuation novels by Hannah.

Last verified: August 25, 2026

View handover timeline
  1. 2014 - Sophie Hannah was appointed to continue with The Monogram Murders.

Hildegarde Withers

Original creator: Stuart PalmerHandover: Unfinished material was completedStatus: Complete

First change: 1969 - Hildegarde Withers Makes the Scene

Fletcher Flora completed Stuart Palmer's final Hildegarde Withers novel, Hildegarde Withers Makes the Scene, after Palmer's death. No continuing Flora-era series followed.

Last verified: August 25, 2026

View handover timeline
  1. 1969 - Fletcher Flora completed Stuart Palmer's unfinished Hildegarde Withers Makes the Scene.
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I5 series

Inspector Frost

Original creator: R.D. WingfieldHandover: Continued with new prequel booksStatus: No new continuation announced

First change: 2011 - First Frost

R.D. Wingfield’s Jack Frost returned in an authorized prequel series. First Frost was written by James Gurbutt and Henry Sutton as “James Henry”; Gurbutt continued alone under that name, before Danny Miller wrote the final two published prequels.

Last verified: August 25, 2026

View handover timeline
  1. 2011 - James Gurbutt and Henry Sutton, writing together as James Henry, began the prequel sequence with First Frost.
  2. 2012 - After Henry Sutton's departure, James Gurbutt continued using the James Henry name with Fatal Frost.
  3. 2018 - Danny Miller took over from James Gurbutt as James Henry with A Lethal Frost.

Inspector Ian Rutledge

Original creators: Caroline Todd, Charles ToddHandover: One of the original writers continued aloneStatus: Continuing

Original public credit: Charles Todd

First change: 2025 - A Christmas WitnessCurrent writer: Charles Todd

Caroline and Charles Todd created and wrote the Ian Rutledge mysteries together under the name Charles Todd. Their final joint Rutledge novel was A Game of Fear (2022). Charles later continued the series alone under the same name, beginning with the 2025 novella A Christmas Witness; A Day of Judgment followed as the first full-length solo-era novel in 2026.

Last verified: August 25, 2026

View handover timeline
  1. 2025 - Charles Todd continued alone from A Christmas Witness after Caroline Todd died.

Inspector Napoleon Bonaparte / Bony

Original creator: Arthur UpfieldHandover: Unfinished material was completedStatus: Complete

First change: 1966 - The Lake Frome Monster

Arthur Upfield died before finishing the final Bony novel. J. L. Price and Dorothy Strange completed The Lake Frome Monster from Upfield's notes; no later continuation series followed.

Last verified: August 25, 2026

View handover timeline
  1. 1966 - J. L. Price and Dorothy Strange completed Arthur Upfield's unfinished The Lake Frome Monster.

Inspector Pel

Original creator: John HarrisHandover: Unfinished material was completed, then the series continuedStatus: No new continuation announced

Original public credit: Mark Hebden

First change: 1992 - Pel and the Sepulchre Job

Mark Hebden died leaving Pel and the Sepulchre Job unfinished; Anthony Masters completed that novel. Hebden's daughter Juliet Harris then continued the series as Juliet Hebden, beginning with Pel Picks Up the Pieces and writing eight further Pel mysteries.

Last verified: August 25, 2026

View handover timeline
  1. 1992 - Anthony Masters completed Mark Hebden's unfinished Pel and the Sepulchre Job.
  2. 1993 - Juliet Harris, writing as Juliet Hebden, continued the series with Pel Picks Up the Pieces.

Isaac Bell

Original creator: Clive CusslerHandover: Continued by one later authorStatus: Continuing

First change: 2009 - The WreckerCurrent writer: Jack Du Brul

Clive Cussler created Isaac Bell and later wrote the series with Justin Scott, then Jack Du Brul. Du Brul became the sole writer with The Sea Wolves in 2022 and continues the series.

On Mystery Sequels: Clive Cussler · Jack Du Brul

Last verified: August 25, 2026

View handover timeline
  1. 2009 - Justin Scott joined Clive Cussler as co-writer with The Wrecker.
  2. 2019 - Jack Du Brul replaced Justin Scott as collaborator, beginning with The Titanic Secret.
  3. 2022 - Jack Du Brul became sole continuation writer with Clive Cussler The Sea Wolves, after previously writing with Clive Cussler.
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J8 series

Jack Reacher

Original creator: Lee ChildHandover: Original author and successor wrote together during the handoverStatus: Continuing

First change: 2020 - The SentinelCurrent writer: Andrew Child

Lee Child began a planned handover of Jack Reacher to Andrew Child with The Sentinel in 2020. The four books from The Sentinel through The Secret were written collaboratively. Andrew Child became the sole writer with In Too Deep in 2024, although the novels continue to be publicly credited to Lee Child and Andrew Child.

On Mystery Sequels: Jack Reacher · Andrew Child · Lee Child

Sources

Last verified: September 5, 2026

View handover timeline
  1. 2020 - Lee Child began a planned handover to Andrew Child with The Sentinel, which they wrote together.
  2. 2024 - Andrew Child became sole continuation writer with In Too Deep, after previously writing with Lee Child.

Jack Ryan

Original creator: Tom ClancyHandover: Different writers were brought in over timeStatus: Continuing

First change: 2014 - Tom Clancy Full Force and EffectCurrent writing: Different writers are commissioned for separate books.

Tom Clancy's Jack Ryan line moved from creator-era collaboration into successive post-Clancy writers. Mark Greaney became the first sole successor, followed by Marc Cameron, Brian Andrews and Jeffrey Wilson, and separate 2026 commissions for Ward Larsen and M.P. Woodward.

On Mystery Sequels: Tom Clancy

Sources

Last verified: September 5, 2026

View handover timeline
  1. 2014 - Mark Greaney became sole continuation writer with Tom Clancy Full Force and Effect, after previously writing with Tom Clancy.
  2. 2017 - Marc Cameron took over from Mark Greaney with Tom Clancy Power and Empire.
  3. 2024 - Brian Andrews and Jeffrey Wilson took over from Marc Cameron with Tom Clancy Act of Defiance.
  4. 2026 - Ward Larsen took over from Brian Andrews and Jeffrey Wilson with Tom Clancy Rules of Engagement.
  5. 2026 - M.P. Woodward was announced to continue Jack Ryan with Tom Clancy The Coldest War, due November 24, 2026.

Jack Ryan Jr.

Original creator: Tom ClancyHandover: Continued by several authorsStatus: Continuing

First change: 2015 - Tom Clancy Under FireCurrent writer: Jack Stewart

Penguin Random House now treats Jack Ryan Jr. as a distinct series branch. Its post-Clancy line has passed through Grant Blackwood, Mike Maden, Don Bentley, M.P. Woodward and Jack Stewart, who is announced through Zero Point in 2027.

On Mystery Sequels: Tom Clancy

Last verified: August 25, 2026

View handover timeline
  1. 2015 - Grant Blackwood began a separate continuation branch with Tom Clancy Under Fire.
  2. 2017 - Mike Maden took over from Grant Blackwood with Tom Clancy Point of Contact.
  3. 2021 - Don Bentley took over from Mike Maden with Tom Clancy Target Acquired.
  4. 2024 - M.P. Woodward took over from Don Bentley with Tom Clancy Shadow State.
  5. 2026 - Jack Stewart took over from M.P. Woodward with Tom Clancy Pressure Depth.

James Bond

Original creator: Ian FlemingHandover: Different writers were brought in over timeStatus: Continuing

First change: 1968 - Colonel SunCurrent writing: Different writers are commissioned for separate books.

After Ian Fleming, the adult James Bond novels moved through a one-off Kingsley Amis continuation, long successor runs by John Gardner and Raymond Benson, and from 2008 a sequence of shorter or single-author commissions. Charlie Higson’s King Zero is scheduled for September 24, 2026.

Last verified: August 25, 2026

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  1. 1968 - Kingsley Amis was commissioned to write Colonel Sun.
  2. 1981 - John Gardner was appointed to continue with Licence Renewed.
  3. 1997 - Raymond Benson took over from John Gardner with Zero Minus Ten.
  4. 2008 - With Devil May Care, the rights holder changed how writers were commissioned.

Jason Bourne

Original creator: Robert LudlumHandover: Continued by several authorsStatus: Continuing

First change: 2004 - The Bourne LegacyCurrent writer: Brian Freeman

Robert Ludlum created Jason Bourne. Eric Van Lustbader continued the series from The Bourne Legacy, and Brian Freeman is the current continuation writer.

On Mystery Sequels: Brian Freeman

Last verified: August 25, 2026

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  1. 2004 - Eric Van Lustbader was appointed to continue with The Bourne Legacy.
  2. 2020 - Brian Freeman took over from Eric Van Lustbader with Robert Ludlum's The Bourne Evolution.

Jerry Cotton

Original creator: Delfried KaufmannHandover: A publisher brought in multiple writers to continue the seriesStatus: Continuing

Original public credit: Creator identity initially undisclosed; later Jerry Cotton house identity

First change: 1955 - Ich schoss auf Jerry CottonCurrent writing: Multiple writers are commissioned by the publisher.

Delfried Kaufmann created Jerry Cotton in 1954, but Bastei brought other writers into the property almost immediately. The series evolved into a long-running publisher-managed house-name operation and is still active in 2026 under the public author identity Jerry Cotton.

Last verified: August 25, 2026

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  1. 1955 - Writing expanded from Delfried Kaufmann to several writers beginning with Ich schoss auf Jerry Cotton.

Jesse Stone

Original creator: Robert B. ParkerHandover: Continued by several authorsStatus: Continuing

First change: 2011 - Robert B. Parker's Killing the BluesCurrent writer: Christopher Farnsworth

Jesse Stone has passed through four continuation writers since Robert B. Parker: Michael Brandman, Reed Farrel Coleman, Mike Lupica and, from Buried Secrets in 2025, Christopher Farnsworth.

Last verified: August 25, 2026

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  1. 2011 - Michael Brandman was appointed to continue with Robert B. Parker's Killing the Blues.
  2. 2014 - Reed Farrel Coleman took over from Michael Brandman with Robert B. Parker's Blind Spot.
  3. 2020 - Mike Lupica took over from Reed Farrel Coleman with Robert B. Parker's Fool's Paradise.
  4. 2025 - Christopher Farnsworth took over from Mike Lupica with Robert B. Parker's Buried Secrets.

Judge Dee / Judge Ti

Original creator: Robert van GulikHandover: Publisher presented later books as a continuationStatus: No new continuation announced

First change: 2004 - Le château du lac Tchou-An

Fayard launched Frédéric Lenormand's Les Nouvelles Enquêtes du juge Ti in 2004 as a continuation/revival of the Judge Dee fiction associated with Robert van Gulik. The character ultimately derives from the historical Di Renjie and older Chinese literature, so this is not an exclusive estate succession.

Last verified: August 25, 2026

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  1. 2004 - Frédéric Lenormand began a publisher-recognized continuation with Le château du lac Tchou-An.
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K1 series

Kommissar X

Original creator: Karl-Heinz GüntherHandover: A publisher brought in multiple writers to continue the seriesStatus: Complete

Original public credit: Bert F. Island

First change: Not confirmed

Karl-Heinz Günther created Kommissar X for Pabel with Das Attentat in late 1958, but authorship began diffusing to other contracted writers during the early creator era under the publisher pseudonym Bert F. Island. After Günther left in 1966, Pabel continued the property with a larger writer pool until 1992.

Last verified: August 25, 2026

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  1. Year not confirmed - Other contracted writers joined Karl-Heinz Günther on Kommissar X during the early creator era; the first additional-writer title is not yet confirmed.
  2. 1966 - After Karl-Heinz Günther left in 1966, Pabel continued Kommissar X with contracted writers.
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L3 series

Leaphorn, Chee & Manuelito

Original creator: Tony HillermanHandover: Continued by a family memberStatus: Continuing

First change: 2013 - Spider Woman's DaughterCurrent writer: Anne Hillerman

Anne Hillerman continued the Navajo mysteries created by her father, Tony Hillerman, beginning with Spider Woman's Daughter in 2013. Her books retain Leaphorn and Chee while moving Bernadette Manuelito into a larger role.

Last verified: August 25, 2026

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  1. 2013 - Anne Hillerman continued after Tony Hillerman, beginning with Spider Woman's Daughter.

Lord Peter Wimsey

Original creator: Dorothy L. SayersHandover: Unfinished material was completed, then the series continuedStatus: No new continuation announced

First change: 1998 - Thrones, Dominations

Jill Paton Walsh was commissioned to complete Dorothy L. Sayers's unfinished Thrones, Dominations and then continued Lord Peter Wimsey in three further novels. No new continuation writer is currently identified.

Last verified: August 25, 2026

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  1. 1998 - Jill Paton Walsh completed Dorothy L. Sayers's unfinished Thrones, Dominations.
  2. 2002 - Jill Paton Walsh continued Lord Peter Wimsey with A Presumption of Death, drawing on Dorothy L. Sayers's Wimsey Papers rather than an unfinished manuscript.

Lou Largo

Original creator: William ArdHandover: Unfinished material was completed, then the series continuedStatus: No new continuation announced

First change: 1960 - Babe in the Woods

William Ard died after writing the first two Lou Largo novels. Lawrence Block completed Babe in the Woods from Ard’s surviving chapters and outline; John Jakes then wrote the final three Largo novels, all still published under Ard’s name.

Last verified: August 25, 2026

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  1. 1960 - Lawrence Block completed William Ard's unfinished Babe in the Woods.
  2. 1961 - John Jakes began writing behind the existing public credit with Make Mine Mavis.
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M9 series

Mack Bolan / The Executioner

Original creator: Don PendletonHandover: A publisher brought in multiple writers to continue the seriesStatus: No new continuation announced

First change: 1973 - Sicilian Slaughter

Don Pendleton wrote the original Mack Bolan run through Satan's Sabbath and in 1980 licensed the characters to Harlequin's Gold Eagle programme. Court records show that he initially helped choose writers, edited manuscripts and contributed some material before the books became a publisher-managed multiwriter series carrying his creator brand.

Last verified: August 25, 2026

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  1. 1973 - William Crawford, writing as Jim Peterson, added the one-off continuation Sicilian Slaughter.
  2. 1974 - Don Pendleton returned with Jersey Guns.
  3. 1980 - From this point, the series moved into a publisher-managed multiwriter model.
  4. 1981 - From The New War, the series moved into a publisher-managed multiwriter model.
  5. 1982 - The books shifted to Don Pendleton's Mack Bolan creator branding while publisher-contracted writers supplied the fiction.

Men at War

Original creator: W.E.B. GriffinHandover: Continued by one later authorStatus: Status not confirmed

First change: 2006 - The SaboteursCurrent writer: Peter Kirsanow

W.E.B. Griffin wrote the early Men at War novels before coauthoring later entries with his son William E. Butterworth IV. Peter Kirsanow continued the series after Griffin's death with The Devil's Weapons and Zero Option.

Last verified: August 25, 2026

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  1. 2006 - W.E.B. Griffin began a planned handover to William E. Butterworth IV. The Saboteurs was the first book in the transition.
  2. 2022 - Peter Kirsanow continued Men at War with The Devil's Weapons after W.E.B. Griffin's death.

Mike Hammer

Original creator: Mickey SpillaneHandover: Unfinished material was completedStatus: Complete

First change: 2006 - The Goliath Bone

Mickey Spillane personally entrusted Max Allan Collins with unfinished Mike Hammer material. Collins completed and developed a long run of posthumous Hammer books from Spillane manuscripts, fragments, synopses and notes; Baby, It’s Murder concluded the series in 2025.

Last verified: August 25, 2026

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  1. 2006 - Before his death in 2006, Mickey Spillane entrusted Max Allan Collins with unfinished Mike Hammer material, including The Goliath Bone.
  2. 2008 - Max Allan Collins completed and published The Goliath Bone from Spillane's unfinished manuscript in 2008.

Mike Shayne

Original creator: Davis DresserHandover: A publisher brought in multiple writers to continue the seriesStatus: No new continuation announced

Original public credit: Brett Halliday

First change: 1958 - Fit to Kill

Davis Dresser created Mike Shayne as Brett Halliday, then began commissioning other writers in 1958. After he stopped writing the novels, later writers continued the series under the unchanged Halliday name.

Last verified: August 25, 2026

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  1. 1958 - Robert Terrall wrote Fit to Kill under the Brett Halliday name as Davis Dresser began delegating Mike Shayne novels to commissioned writers.
  2. 1964 - After Davis Dresser stopped writing, publisher-commissioned writers continued the series under the Brett Halliday name.

Millennium

Original creator: Stieg LarssonHandover: Continued by several authorsStatus: Continuing

First change: 2015 - The Girl in the Spider's WebCurrent writer: Karin Smirnoff

Stieg Larsson wrote the original Millennium trilogy. David Lagercrantz continued it with three novels beginning in 2015, and Karin Smirnoff later took over for a new trilogy beginning with The Girl in the Eagle's Talons.

Last verified: August 25, 2026

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  1. 2015 - David Lagercrantz was appointed to continue with The Girl in the Spider's Web.
  2. 2023 - Karin Smirnoff took over from David Lagercrantz with The Girl in the Eagle's Talons.

Miss Marple

Original creator: Agatha ChristieHandover: Different writers were brought in over timeStatus: Continuing

First change: 2022 - Marple: Twelve New StoriesCurrent writing: Different writers are commissioned for separate books.

Miss Marple returned in 2022 in an authorized collection of twelve new stories by twelve writers. Lucy Foley was later commissioned to write the first new full-length Marple novel of the revival, Murder at the Grand Alpine Hotel, due September 8, 2026.

Sources
  • Marple: Twelve New StoriesOfficial Agatha Christie site confirming the 2022 authorized collection of twelve new Miss Marple stories by twelve writers.
  • Murder at the Grand Alpine HotelOfficial Agatha Christie site confirming Lucy Foley as the writer of Murder at the Grand Alpine Hotel, due September 8, 2026.

Last verified: September 5, 2026

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  1. 2022 - With Marple: Twelve New Stories, the series moved into a publisher-managed multiwriter model using new short fiction.
  2. 2026 - Lucy Foley was commissioned to write Murder at the Grand Alpine Hotel.

Miss Seeton

Original creator: Heron CarvicHandover: Continued by several authorsStatus: No new continuation announced

First change: 1990 - Miss Seeton, by Appointment

Heron Carvic's Miss Seeton mysteries were continued after his death first by Roy Peter Martin as Hampton Charles and then by Sarah J. Mason as Hamilton Crane. Mason later revived the series after a long gap.

Last verified: August 26, 2026

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  1. 1990 - Roy Peter Martin was appointed to continue with Miss Seeton, by Appointment.
  2. 1991 - Sarah J. Mason took over from Roy Peter Martin with Miss Seeton Cracks the Case.
  3. 2017 - Sarah J. Mason revived the series after a long gap with Miss Seeton Quilts the Village.

Mitch Rapp

Original creator: Vince FlynnHandover: Unfinished material was completed, then the series continuedStatus: Continuing

First change: 2015 - The SurvivorCurrent writer: Don Bentley

Kyle Mills first completed Vince Flynn's unfinished The Survivor and then wrote new Mitch Rapp novels. Don Bentley later became the continuing writer.

Last verified: August 25, 2026

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  1. 2015 - Kyle Mills completed Vince Flynn's unfinished The Survivor.
  2. 2024 - Don Bentley took over from Kyle Mills with Capture or Kill, a novel set earlier in the series timeline.

Monkeewrench

Original creators: Patricia Lambrecht, Traci LambrechtHandover: One of the original writers continued aloneStatus: Continuing

Original public credit: P. J. Tracy

First change: 2018 - The Guilty DeadCurrent writer: Traci Lambrecht

P. J. Tracy began as the shared pen name of Patricia and Traci Lambrecht. After Patricia's death, Traci continued Monkeewrench alone under the same name, beginning with The Guilty Dead.

On Mystery Sequels: P. J. Tracy

Last verified: August 25, 2026

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  1. 2018 - Traci Lambrecht continued alone from The Guilty Dead after Patricia Lambrecht died.
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N5 series

Nathan Shapiro

Original creators: Frances Lockridge, Richard LockridgeHandover: One of the original writers continued aloneStatus: No new continuation announced

Original public credit: Frances and Richard Lockridge

First change: 1967 - Murder for Art's Sake

Frances and Richard Lockridge created Nathan Shapiro together. After Frances Lockridge died in 1963, Richard continued the series alone from Murder for Art's Sake in 1967 through The Old Die Young in 1980.

Last verified: August 25, 2026

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  1. 1967 - Richard Lockridge continued alone from Murder for Art's Sake after Frances Lockridge died.

Nero Wolfe

Original creator: Rex StoutHandover: Continued by one later authorStatus: Continuing

First change: 1986 - Murder in E MinorCurrent writer: Robert Goldsborough

With the approval of Rex Stout's estate, Robert Goldsborough began continuing Nero Wolfe with Murder in E Minor in 1986. After a long pause, he revived his continuation in 2012 and is still writing Wolfe novels.

Last verified: August 25, 2026

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  1. 1986 - Robert Goldsborough was appointed to continue with Murder in E Minor.
  2. 2012 - Robert Goldsborough revived the series after a long gap with the prequel Archie Meets Nero Wolfe.

Nick Carter

Original creators: John R. Coryell, Ormond G. SmithHandover: A publisher brought in multiple writers to continue the seriesStatus: No new continuation announced

Original public credit: Nicholas Carter / anonymous or house-style credit

First change: 1891 - Nick Carter, Detective

John R. Coryell wrote the earliest Nick Carter fiction for Street & Smith after Ormond G. Smith helped define the character concept. Frederick Van Rensselaer Dey then took over and produced an enormous long-running body of stories, after which later hired writers continued the publisher-owned detective. It is an early example of a recurring crime character becoming an industrial literary property.

Last verified: August 25, 2026

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  1. 1891 - Frederick Van Rensselaer Dey took over from John R. Coryell with Nick Carter, Detective.
  2. Year not confirmed - From this point, the series moved into a publisher-managed multiwriter model.

NUMA Files

Original creator: Clive CusslerHandover: Continued by one later authorStatus: Continuing

Original public credit: Clive Cussler with Paul Kemprecos

First change: 2011 - Devil's GateCurrent writer: Graham Brown

The NUMA Files began with Clive Cussler and Paul Kemprecos. Graham Brown became Cussler's coauthor from Devil's Gate in 2011 and has written the series alone since Clive Cussler's Dark Vector in 2022.

On Mystery Sequels: Clive Cussler

Last verified: August 25, 2026

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  1. 2011 - Graham Brown replaced Paul Kemprecos as collaborator, beginning with Devil's Gate.
  2. 2022 - Graham Brown became sole continuation writer with Clive Cussler's Dark Vector, after previously writing with Clive Cussler.

NYPD Red

Original creators: James Patterson, Marshall KarpHandover: One of the original writers continued aloneStatus: Continuing

First change: 2022 - NYPD Red 7: The Murder SororityCurrent writer: Marshall Karp

James Patterson and Marshall Karp co-created and coauthored the first six NYPD Red novels. Patterson then left the series and Karp continued alone from Book 7.

Last verified: August 25, 2026

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  1. 2022 - Marshall Karp continued alone from NYPD Red 7: The Murder Sorority after James Patterson left the series.
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O1 series

OSS 117

Original creator: Jean BruceHandover: Continued by a family memberStatus: No new continuation announced

First change: 1966 - Les Anges de Los Angeles

Jean Bruce created OSS 117 and wrote the original series until his death in 1963. His widow Josette Bruce resumed it in 1966; François and Martine Bruce then continued the literary series from 1987 to 1992.

Last verified: August 25, 2026

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  1. 1966 - Josette Bruce continued after Jean Bruce, beginning with Les Anges de Los Angeles.
  2. 1987 - François Bruce and Martine Bruce took over from Josette Bruce with OSS 117 est mort.
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P6 series

Paul Janson

Original creator: Robert LudlumHandover: Continued by several authorsStatus: No new continuation announced

First change: 2012 - The Janson Command

Robert Ludlum introduced Paul Janson in The Janson Directive. Paul Garrison continued the character with The Janson Command and The Janson Option, followed by Douglas Corleone's The Janson Equation in 2015.

Last verified: August 25, 2026

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  1. 2012 - Paul Garrison was commissioned to write The Janson Command.
  2. 2015 - Douglas Corleone took over from Paul Garrison with The Janson Equation.

Pepe Carvalho

Original creator: Manuel Vázquez MontalbánHandover: Only a few later books were addedStatus: No new continuation announced

First change: 2019 - Carvalho: problemas de identidad

Manuel Vázquez Montalbán's heirs authorized Carlos Zanón to bring Pepe Carvalho back in Carvalho: problemas de identidad, published by Planeta in 2019. No continuing Zanón-era series has been established.

Last verified: August 25, 2026

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  1. 2019 - Carlos Zanón added a one-off continuation with Carvalho: problemas de identidad.

Perry Mason

Original creator: Erle Stanley GardnerHandover: Only a few later books were addedStatus: No new continuation announced

First change: 1989 - Perry Mason in Too Many Murders

Erle Stanley Gardner's estate authorized Thomas Chastain to extend Perry Mason. Chastain published two new Mason novels, Too Many Murders in 1989 and The Burning Bequest in 1990; no continuing Chastain-era series followed.

Last verified: August 25, 2026

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  1. 1989 - Thomas Chastain added a one-off continuation with Perry Mason in Too Many Murders.

Peter Duluth

Original creators: Richard Wilson Webb, Hugh Callingham WheelerHandover: One of the original writers continued aloneStatus: Complete

Original public credit: Patrick Quentin

First change: 1954 - My Son, the Murderer

Richard Webb and Hugh Wheeler wrote Peter Duluth as Patrick Quentin. Webb retired from their collaboration around 1952 because of ill health, while Wheeler retained the Patrick Quentin name. Sources conflict over the 1952 Black Widow, so My Son, the Murderer (1954), explicitly identified as Wheeler-only, remains the conservative public transition point.

Last verified: August 26, 2026

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  1. 1954 - Hugh Callingham Wheeler continued alone from My Son, the Murderer after Richard Wilson Webb left the series.

Philip Marlowe

Original creator: Raymond ChandlerHandover: Unfinished material was completed, then the series continuedStatus: Status not confirmed

First change: 1989 - Poodle SpringsCurrent writing: Different writers are commissioned for separate books.

Robert B. Parker first completed Raymond Chandler's unfinished Poodle Springs and then wrote the new Marlowe sequel Perchance to Dream. Later Chandler-estate projects have used different commissioned writers, including John Banville, Lawrence Osborne, Joe Ide and Denise Mina, with Ide's The Goodbye Coast explicitly conceived as a contemporary reimagining.

Last verified: August 26, 2026

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  1. 1989 - Robert B. Parker completed Raymond Chandler's unfinished Poodle Springs.
  2. 1991 - Robert B. Parker completed Poodle Springs from unfinished Raymond Chandler material, then continued with new fiction in Perchance to Dream.
  3. 2014 - John Banville was commissioned to write The Black-Eyed Blonde.
  4. 2018 - Lawrence Osborne was commissioned to write Only to Sleep.
  5. 2022 - Joe Ide reimagined Philip Marlowe in present-day Los Angeles with The Goodbye Coast.
  6. 2023 - Denise Mina was commissioned to write The Second Murderer.

Presidential Agent

Original creator: W.E.B. GriffinHandover: Continued by several authorsStatus: Continuing

First change: 2010 - The OutlawsCurrent writer: Jack Stewart

W.E.B. Griffin wrote the first Presidential Agent novels alone, then coauthored the later creator-era books with his son William E. Butterworth IV. Andrews & Wilson revived the series with Rogue Asset in 2021, and Jack Stewart became the next writer with Direct Action in 2025.

Last verified: August 25, 2026

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  1. 2010 - W.E.B. Griffin began a planned handover to William E. Butterworth IV. The Outlaws was the first book in the transition.
  2. 2021 - Brian Andrews and Jeffrey Wilson revived the series after a long gap with Rogue Asset.
  3. 2025 - Jack Stewart took over from Brian Andrews and Jeffrey Wilson with Direct Action.
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R3 series

Rafferty P.I.

Original creator: W. Glenn DuncanHandover: Continued by a family memberStatus: Continuing

First change: 2018 - False GodsCurrent writer: W. Glenn Duncan Jr.

W. Glenn Duncan Jr. discussed reviving Rafferty with his father and says the creator gave him carte blanche to use the characters and setting. The son rebuilt the continuity from the original paperbacks rather than using unpublished creator material and restarted the series with False Gods in 2018.

Last verified: August 25, 2026

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  1. 2018 - W. Glenn Duncan Jr. continued after W. Glenn Duncan, beginning with False Gods.

Richard Hannay

Original creator: John BuchanHandover: Publisher presented later books as a continuationStatus: Status not confirmed

First change: 2017 - The Thirty-One KingsCurrent writer: Robert J. Harris

Robert J. Harris revived John Buchan's Richard Hannay in The Thirty-One Kings in 2017, followed by Castle Macnab and Redfalcon. Publisher Birlinn/Polygon presents the books as new Richard Hannay adventures continuing Buchan's character.

Last verified: August 25, 2026

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  1. 2017 - Robert J. Harris began a publisher-recognized continuation with The Thirty-One Kings.

Roderick Alleyn

Original creator: Ngaio MarshHandover: Unfinished material was completedStatus: Complete

First change: 2018 - Money in the Morgue

Stella Duffy was commissioned to complete Ngaio Marsh's unfinished Roderick Alleyn novel Money in the Morgue from Marsh's opening chapters and notes. Duffy did not take over the series for further Alleyn novels.

Last verified: August 25, 2026

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  1. 2018 - Stella Duffy completed Ngaio Marsh's unfinished Money in the Morgue.
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S10 series

Sam and Remi Fargo

Original creator: Clive CusslerHandover: Continued by one later authorStatus: Continuing

Original public credit: Clive Cussler and Grant Blackwood

First change: 2012 - The TombsAnnounced next writer: Ryan Pote

The Fargo series used several coauthors during Clive Cussler's lifetime. After the Cussler-Robin Burcell era, Ryan Pote is the announced sole writer of The Serpent's Eye, due in 2027.

On Mystery Sequels: Clive Cussler

Last verified: August 25, 2026

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  1. 2012 - Thomas Perry replaced Grant Blackwood as collaborator, beginning with The Tombs.
  2. 2014 - Russell Blake replaced Thomas Perry as collaborator, beginning with The Eye of Heaven.
  3. 2016 - Robin Burcell replaced Russell Blake as collaborator, beginning with Pirate.
  4. 2027 - Ryan Pote was announced as the next sole writer of the Fargo series, beginning with Clive Cussler The Serpent's Eye, due in 2027.

Sam Durell / Assignment

Original creator: Edward S. AaronsHandover: Continued by one later authorStatus: Complete

First change: 1976 - Assignment—Sheba

After Edward S. Aarons died, six more Sam Durell novels were published under the name Will B. Aarons, Edward's brother and estate executor. Specialist bibliographic evidence, including a report attributed to Will Aarons's son and confirmed by the family's agent, identifies Lawrence Hall as the writer of all six. The public successor credit and actual writing responsibility therefore diverge.

Last verified: August 26, 2026

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  1. 1976 - Lawrence Hall wrote the post-Aarons continuation novels beginning with Assignment—Sheba, while the books were publicly credited to Will B. Aarons.

San-Antonio

Original creator: Frédéric DardHandover: Continued by a family memberStatus: No new continuation announced

Original public credit: San-Antonio

First change: 2001 - Céréales Killer

Patrice Dard says Céréales Killer was begun by him with his father Frédéric Dard’s collaboration and finished after Frédéric died, even though it was presented as the final Frédéric Dard San-Antonio. Patrice then openly continued the characters from Corrida pour une vache folle in 2002 with his family’s agreement.

Last verified: August 25, 2026

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  1. 2001 - Patrice Dard completed Frédéric Dard's unfinished Céréales Killer.
  2. 2002 - Patrice Dard continued San-Antonio with Corrida pour une vache folle after Frédéric Dard's death.

Sexton Blake

Original creator: Harry BlythHandover: A publisher brought in multiple writers to continue the seriesStatus: No new continuation announced

Original public credit: Hal Meredeth

First change: 1894 - The Lamp of Death (Part One)

Harry Blyth created Sexton Blake in 1893 and sold the character copyright with the original commission. Patrick Morris began the first outside-written Blake serial, The Lamp of Death, in 1894 while Blyth was still contributing; the publisher-owned character then expanded into a vast multiwriter property.

Last verified: August 25, 2026

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  1. 1894 - Writing expanded from Harry Blyth to several writers beginning with The Lamp of Death (Part One).

Sherlock Holmes

Original creator: Arthur Conan DoyleHandover: Publisher presented later books as a continuationStatus: No new continuation announced

First change: 2011 - The House of Silk

The Conan Doyle Estate authorized Anthony Horowitz to write The House of Silk and later Moriarty. This is a distinct approved continuation programme, not a claim that Horowitz took over Sherlock Holmes generally; many other Holmes works exist outside that estate-backed line.

Last verified: August 25, 2026

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  1. 2011 - Anthony Horowitz was commissioned to write The House of Silk.

Sid Halley

Original creator: Dick FrancisHandover: Continuation approved by the original authorStatus: Continuing

First change: 2006 - Under OrdersCurrent writer: Felix Francis

Felix Francis says he took over writing the Dick Francis novels with the Sid Halley novel Under Orders in 2006 while his father was still alive, even though the book was publicly credited to Dick Francis. Later Sid Halley novels are openly by Felix Francis.

Last verified: August 25, 2026

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  1. 2006 - Dick Francis began a planned handover to Felix Francis. Under Orders was the first book in the transition.
  2. 2013 - Refusal was the first Sid Halley novel openly credited to Felix Francis.

Solar Pons

Original creator: August DerlethHandover: Different writers were brought in over timeStatus: Continuing

First change: 1979 - The Dossier of Solar PonsCurrent writing: Different writers are commissioned for separate books.

After August Derleth, Basil Copper wrote authorized Solar Pons stories commissioned by Arkham House and Derleth's estate. The estate later authorized David Marcum's 2017 revival and a continuing multi-author programme, making Pons a multiple-stage authorized continuation rather than a simple Derleth-to-Copper handover.

Last verified: August 25, 2026

View handover timeline
  1. 1979 - Basil Copper was appointed to continue with The Dossier of Solar Pons.
  2. 2017 - David Marcum revived the series after a long gap with The Papers of Solar Pons.
  3. Year not confirmed - From The New Adventures of Solar Pons, the series moved into a publisher-managed multiwriter model.

Spenser

Original creator: Robert B. ParkerHandover: Continued by several authorsStatus: Continuing

First change: 2012 - Robert B. Parker's LullabyCurrent writer: Mike Lupica

Robert B. Parker's estate appointed Ace Atkins to continue Spenser in 2012. Mike Lupica took over the continuing series with Broken Trust in 2023; separately, Helen Brann completed Parker's unfinished Silent Night manuscript in 2013.

Last verified: August 25, 2026

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  1. 2012 - Ace Atkins was appointed to continue with Robert B. Parker's Lullaby.
  2. 2013 - Helen Brann completed Robert B. Parker's unfinished Silent Night.
  3. 2023 - Mike Lupica took over from Ace Atkins with Robert B. Parker's Broken Trust.

Stone Barrington

Original creator: Stuart WoodsHandover: Unfinished material was completed, then the series continuedStatus: Continuing

First change: 2023 - Near MissCurrent writer: Brett Battles

After Stuart Woods died, Brett Battles completed Woods's unfinished Stone Barrington novel Near Miss. Smolder was the first Stone Barrington novel written entirely by Battles, who now continues the series under Stuart Woods branding.

On Mystery Sequels: Stuart Woods

Last verified: August 25, 2026

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  1. 2023 - Brett Battles completed Stuart Woods's unfinished Near Miss.
  2. 2024 - Smolder was the first Stone Barrington novel written entirely by Brett Battles after he completed Stuart Woods's unfinished Near Miss.

Sunny Randall

Original creator: Robert B. ParkerHandover: Continued by several authorsStatus: Continuing

First change: 2018 - Robert B. Parker's Blood FeudCurrent writer: Alison Gaylin

Mike Lupica revived Robert B. Parker's Sunny Randall series with Blood Feud in 2018. Alison Gaylin became the next continuation writer with Bad Influence in 2023 and remains the current author.

Last verified: August 25, 2026

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  1. 2018 - Mike Lupica was appointed to continue with Robert B. Parker's Blood Feud.
  2. 2023 - Alison Gaylin took over from Mike Lupica with Robert B. Parker's Bad Influence.
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T7 series

Teddy Fay

Original creator: Stuart WoodsHandover: Continued by one later authorStatus: Continuing

Original public credit: Stuart Woods and Parnell Hall

First change: 2021 - JackpotCurrent writer: Brett Battles

The Teddy Fay novels began with Stuart Woods and Parnell Hall, later used Bryon Quertermous, and then paired Woods with Brett Battles. Battles was already coauthoring Teddy Fay while Woods was alive and became the sole continuing writer after Woods's death.

On Mystery Sequels: Stuart Woods

Last verified: August 25, 2026

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  1. 2021 - Bryon Quertermous replaced Parnell Hall as collaborator, beginning with Jackpot.
  2. 2023 - Brett Battles replaced Bryon Quertermous as Stuart Woods's co-writer with Obsession.
  3. 2024 - Brett Battles became sole continuation writer with Golden Hour, after previously writing with Stuart Woods.

The Destroyer

Original creators: Warren Murphy, Richard SapirHandover: A publisher brought in multiple writers to continue the seriesStatus: Continuing

First change: 1981 - Balance of PowerCurrent writing: Multiple writers are commissioned by the publisher.

The Destroyer never followed one clean handover. Warren Murphy and Richard Sapir created the series, later used supervised ghostwriters, and Will Murray became a long-running principal writer before further successors took over. Murphy returned to active authorship in later arrangements, and the property has continued through licensed multi-author fiction.

Last verified: August 25, 2026

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  1. 1981 - The Destroyer began using creator-selected outside writers with Balance of Power, while Warren Murphy and Richard Sapir retained supervisory control.
  2. 1987 - Will Murray became the series's principal continuation writer with Blood Ties.
  3. 1998 - Jim Mullaney became a principal Destroyer writer with The Prophet of Doom after Will Murray's run and other interim writers.
  4. 2007 - Warren Murphy returned to active authorship with Jim Mullaney in The New Destroyer: Guardian Angel.
  5. 2024 - The licensed 2024 collection Remo Williams, The Destroyer: The Adventures Continue brought together original, successor, and new writers.

The Oregon Files

Original creator: Clive CusslerHandover: Continued by one later authorStatus: Continuing

Original public credit: Clive Cussler and Craig Dirgo

First change: 2005 - Dark WatchCurrent writer: Mike Maden

The Oregon Files moved through Clive Cussler's collaborations with Craig Dirgo, Jack Du Brul and Boyd Morrison before Mike Maden became the sole continuation writer with Hellburner in 2022.

On Mystery Sequels: Clive Cussler · Jack Du Brul

Last verified: August 25, 2026

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  1. 2005 - Jack Du Brul replaced Craig Dirgo as collaborator, beginning with Dark Watch.
  2. 2015 - Boyd Morrison replaced Jack Du Brul as collaborator, beginning with Piranha.
  3. 2022 - Mike Maden became the sole continuation writer with Clive Cussler's Hellburner in 2022.

The Saint

Original creator: Leslie CharterisHandover: Original author supervised other writersStatus: Complete

First change: 1964 - Vendetta for the Saint

Leslie Charteris gradually delegated Saint fiction to other writers while retaining editorial control. Harry Harrison wrote Vendetta for the Saint in 1964, and Fleming Lee became Charteris’s hand-picked principal successor in the later supervised team era that ran to 1983.

Last verified: August 25, 2026

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  1. 1964 - Harry Harrison wrote Vendetta for the Saint from Leslie Charteris material under Charteris's supervision, followed by other supervised contributors.
  2. 1968 - Fleming Lee became Charteris's hand-picked principal continuation writer with The Saint on TV, working within the supervised team model.

The Toff

Original creator: John CreaseyHandover: Only a few later books were addedStatus: Complete

First change: 1978 - The Toff and the Dead Man's Finger

John Creasey's The Toff continued one book beyond the creator-written sequence. The official Creasey bibliography identifies William Vivian Butler as the writer of The Toff and the Dead Man's Finger (1978), while the preceding 1977 title remains a posthumous Creasey work.

Last verified: August 25, 2026

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  1. 1978 - William Vivian Butler added a one-off continuation with The Toff and the Dead Man's Finger.

Tommy Hambledon

Original creators: Adelaide Frances Oke Manning, Cyril Henry ColesHandover: One of the original writers continued aloneStatus: No new continuation announced

Original public credit: Manning Coles

First change: 1960 - Crime in Concrete

Manning Coles was the shared name of Adelaide Manning and Cyril Coles. After Manning died in 1959, Coles continued under the same name; specialist histories place Crime in Concrete (1960) in this transition, although its exact division of labor remains uncertain. The final two Hambledon novels were securely written by Coles with Tom Hammerton while still published as Manning Coles.

Last verified: August 26, 2026

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  1. 1960 - Cyril Henry Coles continued alone from Crime in Concrete after Adelaide Frances Oke Manning died.
  2. 1961 - Tom Hammerton joined Cyril Henry Coles as co-writer with Search for a Sultan.

Tracy Whitney

Original creator: Sidney SheldonHandover: Continued by one later authorStatus: No new continuation announced

First change: 2014 - Sidney Sheldon’s Chasing Tomorrow

Sidney Sheldon created Tracy Whitney in If Tomorrow Comes. After his death, the Sheldon family selected Tilly Bagshawe to continue his legacy; Bagshawe returned to Tracy with Sidney Sheldon’s Chasing Tomorrow in 2014 and Sidney Sheldon’s Reckless in 2015.

Last verified: August 25, 2026

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  1. 2014 - After Sidney Sheldon's death, his family selected Tilly Bagshawe to continue Tracy Whitney with Sidney Sheldon's Chasing Tomorrow.
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Edited by

Marika

Marika started Mystery Sequels in 2013 as a book blog and review site. It later developed into a reference for crime, mystery and thriller books in order. She researches and maintains its author and series guides, including publication history, connected books and continuation authors.