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Sigma Force · Book 8

The Skeleton Key

by James Rollins
Published
1 January 2011
Pages
123
ISBN-13
9781409143420
Type
short
Buy on Amazon All Sigma Force books in order
Cover of The Skeleton Key

About this book

"The Skeleton Key" (2011) is a short story rather than a full novel, published between "The Doomsday Key" and "The Devil Colony" — one of the digital-only vignettes James Rollins wrote alongside the numbered Sigma Force novels, optional reading for series completists rather than part of the core eighteen-book path.

Key facts about The Skeleton Key

James Rollins wrote The Skeleton Key, a short story on our list. It has been out since 2011. The book has 123 pages.

We list 1 edition of this short story. Since each edition has its own ISBN, search for 9781409143420 to find the main one.

The Skeleton Key is book 8 of 24 in the Sigma Force series. The series has 24 published books. However, the series starts with Sandstorm (2004). Crucible is the latest book in the series with a full release date, out on 22 January 2019.

Additionally, James Rollins writes Order of the Sanguines, Tucker Wayne and Moonfall as separate series. Those series sit on our thriller, supernatural thriller and fantasy shelves. Meanwhile, Trust No One is the latest published James Rollins book on file, from 24 February 2026. The next announced James Rollins release is due on 1 December 2026, so there is still more to come.

About James Rollins

James Rollins is the pen name of James Czajkowski, an American author and former veterinarian who left his practice to write adventure thrillers that blend cutting-edge science, historical mystery, and globe-trotting action. See every James Rollins book in order.

Its place in Sigma Force

The Skeleton Key is book 8 in the Sigma Force series. It follows The Doomsday Key. It is followed by The Devil Colony. See the full Sigma Force reading order.

Sigma Force is a covert unit of the U.S. Defense Advanced Research Projects Agency (DARPA), staffed by former special-forces operatives cross-trained as scientists and sent to investigate threats where cutting-edge science and ancient mystery collide. Every novel pairs a real scientific or historical hook — CRISPR gene editing, quantum physics, lost expeditions, ancient plagues, cryptozoology, Norse and biblical lore — with a globe-spanning conspiracy, and James Rollins (a veterinarian by training) grounds even…

Editions

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