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In the latest Sigma Force Novel, a masterful epic of timeless mystery and ripped-from-the-headlines scientific intrigue, New York Times bestseller James Rollins takes mankind to the brink of our coming destruction, to a fate written in rock and ice, to an event known as THE SIXTH EXTINCTION.

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A remote military research station sends out a frantic distress call, ending with a chilling final command: Kill us all! Personnel from the neighboring base rush in to discover everyone already dead-and not just the scientists, but every living thing for fifty square miles is annihilated: every animal, plant, and insect, even bacteria.

The land is entirely sterile-and the blight is spreading.

To halt the inevitable, Commander Gray Pierce and Sigma must unravel a threat that rises out of the distant past, to a time when Antarctica was green and all life on Earth balanced upon the blade of a knife. Following clues from an ancient map rescued from the lost Library of Alexandria, Sigma will discover the truth about an ancient continent, about a new form of death buried under miles of ice.

From millennia-old secrets out of the frozen past to mysteries buried deep in the darkest jungles of today, Sigma will face its greatest challenge to date: stopping the coming extinction of mankind.

But is it already too late?

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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.

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