Darkly Dreaming Dexter by Jeff Lindsay

Dexter Morgan: brother, son, forensic technician for the Miami police department, and vigilante serial killer. In this opener for Jeff Lindsay's "Dexter" series, we meet Dexter Morgan, a special kind of serial killer whose prey exclusive includes other ***ers. With his meticulous killing style and strict rules (supplied to him by his adoptive father), he's sure he'll never be caught. But when another killer crops up in Miami with a seemingly similar signature, it's up to Dexter to find this guy before he wreaks havoc on his otherwise serene life.