Prosper Snow is at it again and his past transgressions have caught up with him. He is back to his rogue self, recruiting a thief and Wolfe to help him, when a string of grisly murders draws him in to a case where an occult government agency conducts experiments on nature versus nurture. What compels people to kill? What is the benefit of knowing? Those experimented on kill because they are trained to and they know nothing else. With these made monsters loose in the world, no one is safe. A follow-up novel to The Kult, Killers is a great addition to the series, but is able to stand on its own. Shaun Jeffrey delivers a taut tale full of twists. ( )