The Increment: Matt Browning, Book 2

The Increment: the elite assassination unit of the SAS. MI6 are demanding he help a giant drug company destroy copies of its medicines being produced by Eastern European gangsters. But the mission is not what it seems. An old friend from the Army has turned into a homicidal maniac, and so are soldiers from around the country. Suddenly Matt finds himself thrust into the center of a deadly mystery. As the answers start to unravel, Matt finds himself the only man in possession of a terrifying secret. Alone and on the run, he is up against The Increment, the most ruthless, lethal killing machine on earth.