Dearly Devoted Dexter by Jeff Lindsay

Fun concept and light and enjoyable read, I would read another.  PW: Dexter, your friendly neighborhood serial killer, is a police department blood-spatter expert who, in his spare time, kills people. Not just anyone, you understand--he only kills other killers, people whom he believes deserve it. Is this because Dexter really has a heart of gold? No, he's a monster (he is the first to admit it), but at least he tries to steer his evil into productive channels. In the second of Lindsay's alliteratively titled thrillers (following last year's Darkly Dreaming Dexter), Dexter's nemesis, Sergeant Doakes, is getting a little too close for comfort, and there is also the matter of a psychopath on the loose. When Dexter's two problems eventually link up . . . well, what's a well-meaning homicidal maniac to do? Dexter, the cheerfully sociopathic crime fighter, is one of mystery fiction's most original, compelling, and oddly endearing heroes.