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. The novel prefigures Greene's later, more famous, work, Brighton Rock, wherein Pinkie Brown's killing of Hale sets the events of the novel in motion in much the same way that Raven's assassination of the Minister of War sows the seeds for conflict in A Gun for Sale. Source: Wikipedia (en)