This Gun for Hire
A Gun for Sale is a 1936 novel by Graham Greene about a criminal called Raven, a man dedicated to ugly deeds. When he is paid, with stolen notes, for killing the Minister of War, he becomes a man on the run. Tracking down the agent who double-crossed him, and eluding the police simultaneously, he becomes both the hunter and the hunted. The novel was published and filmed in the United States under the title "This Gun for Hire".