This document summarizes key differences between Ken Kesey's novel One Flew Over the Cuckoo's Nest and the 1975 film adaptation. In the novel, Chief Bromden is the narrator and the story is told from his perspective, including surreal scenes that may be hallucinations. The film takes a more realistic approach, with Bromden as a secondary character and McMurphy portrayed as the clear hero. While the novel invites understanding Bromden's point of view, the film emphasizes realism over challenges to ordinary reality.