Paradox

Paradox

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by Douglas Preston

Cash & Colcord series #2

published April 2026

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Douglas Preston co-wrote Paradox with his daughter Aletheia Preston, a former trial attorney turned novelist. Book 2 in the Cash & Colcord series, it brings CBI Agent Frankie Cash and Eagle County Sheriff Jim Colcord back into a case that mixes murder investigation, fringe science, and a larger threat already set in motion in Extinction.

A sacred relic has been defaced, an old prospector has been found murdered in the Colorado wilderness, and soon after that a controversial exobiologist is killed in equally brutal fashion. As the bodies begin to pile up, Frankie Cash and Jim Colcord are pulled into a case that is far stranger than it first appears.

When the prospector’s death turns into a much larger investigation, CBI Agent Frankie Cash and Eagle County Sheriff Jim Colcord find themselves working a case that is stranger and more dangerous than anything they expected. Soon a controversial scientist is found dead after being tortured in a way that points back to the medieval past. As Cash and Colcord dig deeper, they uncover more brutal killings, unexplained money transfers, and the presence of a secret society driven by fanatic beliefs.

While Cash and Colcord try to make sense of the killings, another threat is growing in the mountains. The resurrected Neanderthals who disappeared during their previous case have not gone away. They seem to be waiting, and whatever they are planning could bring disaster to everyone nearby.