This document presents excerpts from William Peter Blatty's novel, Legion, published in 1983, and dedicated to "Billy and Jennifer." The text introduces Detective Kinderman, who is grappling with existential questions about good and evil while investigating a gruesome murder at a boathouse. The narrative also follows Doctor Amfortas, a neurologist confronting his own mortality and a perplexing series of events, including an unusual "double" who claims to be from his own tape recordings and attributes the murders to Amfortas's repressed anger. As Kinderman uncovers shocking connections to the Gemini Killer, a seemingly deceased serial murderer, and suspects a psychiatric patient named Sunlight of involvement, the story intricately weaves together themes of faith, identity, and the unsettling nature of the human mind, culminating in a complex interplay of personal and theological mysteries.