What is "Dexter"? Dexter is the eponymous character from the novels Darkly Dreaming Dexter (2004), Dearly Devoted Dexter (2005), Dexter in the Dark (2007), Dexter by Design (2009), Dexter Is Delicious (2010), Double Dexter (2011), Dexter's Final Cut (2013), and Dexter Is Dead (2015) - as well as the Showtime crime drama "Dexter," which ran from 2006 to 2013. Though there are differences from the show and the books, they both center around Dexter Morgan, a blood spatter analyst who hides a deep secret from his friends and family: Dexter is a serial killer, specifically a serial killer who targets other murderers who have escaped justice for one reason or another. In carrying out this dark secret, Dexter follows a code of ethics taught to him in childhood by his adoptive father, Harry, which Dexter calls "The Code" or "The Code of Harry." The Code functions on two principles: Dexter can only kill people after finding conclusive evidence that they are guilty of murder and he must