Darkly Dreaming Dexter
Jeff Lindsay
 The novel's protagonist, Dexter Morgan, works for the Miami-Metro Police Department as a forensic blood spatter pattern analyst. In his spare time, Dexter is a serial killer who kills murderers, rapists and other undesirables he believes have escaped justice. Dexter's murders are directed by an inner voice he refers to as the "Dark Passenger", who keeps prodding Dexter to kill something. Once he has done so, the voice is satisfied for a while, but always comes back. Flashbacks reveal that his foster father, a police detective named Harry Morgan, recognized early on that Dexter was a violent sociopath with an innate need to kill, and taught him how to kill people who have gotten away with murder as a way to channel his homicidal urges in a "positive" direction. Harry also taught the boy to be a careful, meticulous killer, to leave no clues, and to be absolutely sure his victims are guilty before killing them. Dexter calls these rules "the code of Harry." Dexter manages his double life reasonably well for years, but his idyll is disturbed when he becomes involved in the investigation of a series of killings of prostitutes. As the "Tamiami Slasher" rampages through the city, he begins sending messages to Dexter, who finds the series of terrifying crimes engrossing and fascinating. Meanwhile, his adoptive sister Deborah sees the case as her ticket out of the Vice unit and into Homicide. Dexter is torn between helping her catch the killer and a desire to sit back and admire the artistry and skill of a fellow killer's work.