Gem's Machine — Stephen Donald Huff

Take away all a man has. Burn away every sense but that of pain. Blow away the ashes of everything he once was and will no longer be. What remains? Something deadly. Make a man into such a thing, and you make him into something worse than an animal. Such a creature is capable of anything, since it is willing to do anything. Become anything. Anything it has to be to end its suffering and die properly. After a terrible crime, Maxwell Deem chooses the divergent pathway of revenge. With a laser-beam focus, he identifies his targets and then cuts straight to the kill. Sun hot. Blinding white. Unstoppable.