In the novelsModifica
- Articolo principale: Deborah Morgan
In the books, the character's name is spelled "Deborah", and she is described as "voluptuous". She also talks about how she has not been taken seriously because she has large breasts. In the novel Darkly Dreaming Dexter and the follow-up novels, Deborah finds out her brother is a killer, and appears to accept it, although sometimes torn between her duty as a sister and as a cop regarding what she should do to him. After being stabbed in Dexter By Design, Deborah has finally come to accept Dexter for what he is, and in Dexter is Delicious, she even asks him to kill Bobby Acosta, knowing he will walk away free after being found to be a cannibal because of his family's wealth and connections.
At the conclusion of Dexter is Delicious, Deborah is pregnant by Kyle Chutsky, who had left her after coming to the conclusion that he was of no use to her. She is also unaware that Brian has returned as her birthing classes are on the same day that Brian visits Dexter and Rita.