Who does the US government call upon when a mission requires perfect stealth execution and discretion Meet the newest recruits to the expanding Sigma Force universe--former Army Ranger Tucker Wayne and his stalwart companion Kane a military working dog of exceptional abilities -- inTHE KILL SWITCHThe mission seems simple enough extract a pharmaceutical magnate from Russian soil a volatile man who holds the secret to a deadly bioweapon But nothing is as it appears to be A conspiracy of world-shattering scope unravels as Tucker and Kane struggle to keep one move ahead of their deadly enemiesFrom the frozen steppes of Russia to the sun-blasted mountains of South Africa and Namibia a biological threat millions of years in the making strikes out at the heart of America All that stands in the way from a global apocalypse one man and his dog But can even Tucker and Kane thwart an ecological menace out of the ancient past to save the worlds future.
