"This Gun for Hire" is a 1936 novel by Graham Greene that follows the story of a hitman named Raven. He is hired to carry out a job but finds himself double-crossed, leading him on a quest for revenge. The narrative explores themes of morality, betrayal, and the complexities of human nature. The novel was adapted into a film in 1942, starring Alan Ladd as Raven. The movie retains the core elements of the book while adding suspense and action, making it a classic in the film noir genre. Both the novel and film highlight the struggles of a man caught in a corrupt world.