Below is the complete list of Douglas Preston’s Cash and Colcord books in order of publication. This is the recommended reading sequence for the series.
Cash & Colcord Books in Publication Order
About Cash and Colcord
Douglas Preston’s Cash and Colcord books are a new, sharply defined thriller line rather than an older hidden branch of his solo fiction. The official Macmillan series page currently lists two books in the sequence: Extinction and Paradox. That matters because readers sometimes confuse this pair with Preston’s earlier solo thrillers such as Tyrannosaur Canyon or Blasphemy, but those belong to the Wyman Ford books instead, not to Cash and Colcord.
What gives Cash and Colcord its identity is the partnership at the center. This is not a lone-genius thriller series in which one eccentric investigator carries the whole burden of the story. The series is built around two contrasting men, and that contrast is the real engine. Even before the line grows large, the name itself signals a more relational kind of suspense: two personalities, two outlooks, and a thriller structure that depends on friction as much as action. That makes the series feel different from Preston’s Wyman Ford novels, which are more squarely centered on one recurring lead moving through scientific and historical mysteries.
The first book, Extinction, sets the tone in a very Preston-like way by taking a high-concept scientific premise and turning it into a fast, dangerous thriller. Macmillan’s author and title pages describe it as a Michael Crichton–style novel, which is a useful shorthand for the reading experience: big idea, contemporary stakes, and a modern setting where technology and ambition open the door to catastrophe. But what matters beneath that premise is that Preston is using it to launch a new recurring world rather than simply write another standalone disaster thriller.
Paradox then confirms that this is a real continuing line, not a one-book experiment. The official series page places it directly after Extinction, and bookseller series listings identify it as book two, with Douglas Preston joined by Aletheia Preston. That collaboration is one of the notable features of the series as it now stands. It gives the line a slightly different place in Preston’s bibliography: familiar in its thriller instincts, but newer in structure and authorship, with a sense of expansion rather than simple continuation.
Because the series is still small, the most useful context is not a long explanation of sequence but a sense of what sort of thriller world this appears to be becoming. Cash and Colcord looks like Preston working in a contemporary, idea-driven suspense mode, but doing so through a duo rather than a solitary specialist. That gives the books room for a more dynamic internal energy. The suspense can come not only from the external threat, but from the way two different minds confront it. In a catalogue that already includes major recurring figures such as Pendergast and Wyman Ford, that shift is enough to make the series feel distinct.
Beneath an already completed list, the best way to understand the Cash and Colcord books is as Douglas Preston’s newer thriller partnership series: compact for now, modern in concept, and clearly separate from his earlier solo franchises. The line begins with Extinction and continues with Paradox, and its real promise lies in the fact that it is being built around a pair of characters rather than a single established hero.