http://worldcat.org/entity/work/id/1407764212

The 6th extinction : a Sigma Force novel

A military research station buried in the remote Sierra Nevada Mountains of Northern California broadcasts a frantic distress call that ends with a chilling order: "This is sierra, victor, whiskey. There's been a breach. Failsafe initiated. No matter the outcome: Kill us ... kill us all." The site is part of TECOMM, the U.S. Army Test Command. When help arrives to investigate, they discover that everyone in the lab is dead -- not just the scientists, but every living thing for fifty square miles is annihilated: every animal, plant, and insect, even bacteria. The land is completely sterile -- and the blight is spreading. Only one team on Earth has the scientific knowledge and military precision to handle this mission: Commander Gray Pierce and Sigma. The dead scientists were working on a secret project, researching radically different forms of life on Earth, life that could change our understanding of biology and humanity itself. But something set off an explosion in the lab, and now Sigma must contend with the apocalyptic aftermath. To prevent the inevitable, they must decipher a futuristic threat that rises out of the distant past -- a time when Antarctica was green and life on Earth was balanced on a knife's edge. Following a fascinating trail of clues buried in an ancient map rescued from the lost Library of Alexandria, Sigma will make a shocking discovery involving a prehistoric continent and a new form of life and death buried under miles of ice. Gray Pierce and his dedicated team must race through eons of time and across distant continents to decipher millennia-old secrets out of the frozen past and untangle mysteries buried deep in the darkest jungles of today, as they face their greatest challenge yet: stopping the Sixth Extinction -- the end of humankind. But is it already too late?

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