Dearly Devoted Dexter

Homicidal maniac Dexter Morgan, narrator of the bestselling "Darkly Dreaming Dexter," returns and must slip further into his foolproof domestic disguise to avoid the suspicions of Miami Police Sergeant Doakes.
Life's tough for Dexter Morgan. It's not easy being the world's only serial killer with a conscience, especially when you work for the Miami police. To avoid suspicion, Dexter's had to slip deep into his disguise: spending time with his girlfriend and her kids, slowly becoming the world's first serial killing couch potato. Then a particularly nasty psychopath starts cutting a trail through Miami -- a killer whose twisted techniques leave even Dexter speechless. When his sister Deborah, a tough-as-nails cop, is drawn into the case, it becomes clear that Dexter will have to do come out of hiding and hunt the monster down. Unless, of course, the killer finds him first. . .