Blood remains after death, rots away with the body. But breath - breath is both a sign and a source of vitality. To draw off some of that vitality, to consume someone's life, can be as simple as inhaling their breath. That was how Mathew Dacorian's upstairs neighbor had been killed, the latest in a series of victims who had apparently died from nothing more than a forced, full exhalation. Mathew wasn't a detective, and he didn't believe in the supernatural,...