Parents need to know that The Diabolic is a stand-alone science fiction novel by . Kincaid , about a genetically engineered living weapon who learns what it means to be human. Nemesis, the protagonist, starts the book as a quick-to-kill personal bodyguard, but she gradually learns to control her homicidal impulses. The book contains scenes of violence -- a duel to the death, an attempted sexual assault -- but they tend to be short and not overly graphic in their descriptions. Sexual content is limited to a few passionate embraces. Characters use recreational opiates mixed with body ointments.