From bestselling authors James Rollins and Grant Blackwood, the 1st installment in an exciting new thriller series based on the Sigma Force novels featuring former Army Ranger Tucker Wayne and his partner, Army functioning dog Kane, introduced in the brand new York Times bestseller Bloodline and the e-original story “Tracker.”

Former Army Ranger Tucker Wayne and his army working puppy Kane are recruited by Sigma Drive to extract a Russian pharmaceutical magnate from Siberia. A medical genius, the drug tycoon holds the biological key to a fresh weapon program, a danger constructed from the historic past to terrorize the modern world.

From the frozen steppes of Russia to the sun-blasted savannahs of Africa, Tucker and Kane need to patch together a mystery going back to the origins of life on Earth-before the ancient peril can destroy the heartland of America, and with it, all of humankind.