From the haunted swamplands of the deep South to the beachheads of a savage civil war in Trinidad, Tucker and Kane must discover the truth behind a mystery that leads back to World War II, to a true event that is even now changing the world . . . and will redefine what it means to be human....

Who does the U.S. 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 — in: THE KILL SWITCH...