KINGDOM OF BONES: James Rollins’ Next Sigma Force Novel Announced

On March 9, 2021, the gang from Sigma Force returns in Kingdom of Bones, the 16th book in James Rollins New York Times bestselling series.

After undergoing a title change (from The Savage Zone), Rollins forthcoming new thriller will follow the events of The Last Odyssey (2020) and bring back his beloved characters for what promises to be one of his most heart-pounding novels to date. This time around, Commander Gray Pierce and his Sigma Force team are called on when a medical team visiting a small village in the Congo files a shocking report that suggests an “unknown force is leveling the evolutionary playing field” leaving the local people in a “cattle-like state” as the territory and world around them evolves into something truly sinister.

Could Mother Nature be turning on humans? You’ll have to pick up Rollins’ book to find out.

See the official plot details below.


James RollinsFrom #1 New York Times bestselling author James Rollins, the latest riveting, deeply imaginative thriller in the Sigma Force series, told with his trademark blend of cutting-edge science, historical mystery, and pulse-pounding action.

It begins in Africa . . .

A United Nations relief team in a small village in the Congo makes an alarming discovery. An unknown force is leveling the evolutionary playing field. Men, women, and children have been reduced to a dull, cattle-like state. The natural world surrounding them—plants and animals—have grown more cunning and predatory, evolving at an exponential pace. The insidious phenomenon is spreading across the African continent, threatening the rest of the world. But is it a natural event? Or more terrifyingly, did someone engineer it?

What has made the biosphere run amok? Commander Gray Pierce and Sigma Force are prepared for the extraordinary and have kept the world safe—vigilance for which they have paid a tragic personal price. Yet even these brilliant and seasoned scientific warriors do not understand what is behind this frightening development—or know how to stop it. As they race across the nation and around the globe—from Washington D.C. to the densest jungles of Africa—to find answers, the members of Sigma realize they have become prey.

To head off a global catastrophe, Sigma Force risks their lives to uncover the shattering secret at the heart of a biosphere run amok—a truth that will illuminate who we are as a species and where we may be headed . . . sooner than we know.

Mother Nature—red in tooth and claw—is turning against humankind, plummeting the entire world into the Kingdom of Bones.



James Rollins is the author of international thrillers that have been translated into more than forty languages. His Sigma series has been lauded as one of the “top crowd pleasers” (New York Times) and one of the “hottest summer reads” (People magazine). In each novel, acclaimed for its originality, Rollins unveils unseen worlds, scientific breakthroughs, and historical secrets—and he does it all at breakneck speed and with stunning insight. He lives in the Sierra Nevada mountains.

Readers excited to pre-order Kingdom of Bones can now do so here or anywhere else books are sold. Meanwhile, fans looking to get their Sigma fix a little quicker can pick up Unrestricted Access, a brand new collection of short stories, which comes out next week.



Praised as “One of the hardest working, most thoughtful, and fairest reviewers out there” by #1 New York Times bestselling author Lisa Scottoline, Ryan Steck has “quickly established himself as the authority on mysteries and thrillers” (Author A.J. Tata). Steck also works full-time as a freelance editor and pens a monthly thriller column for CrimeReads. For more information, be sure to follow him on Twitter and Facebook. He currently lives in Southwest Michigan with his wife and their six children.

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