A Gun for Sale is a 1936 novel by Graham Greene about a criminal called Raven, a man dedicated to ugly deeds.

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.

Thusly disguised as a student participating in the rag stunt, Raven spots Davis, without a gas-mask, in the street, and fines him for charity.

Going there, Raven discovers it is the headquarters of a giant steel company that will profit hugely from a war and that the boss is Sir Marcus, a corrupt industrialist.

Several film and television adaptations have been made; a 1942 film version transposed to wartime California starred Alan Ladd and Veronica Lake under the title This Gun for Hire, a Turkish adaptation (Günes Dogmasin) was made in 1961 and 1972 as Yaralı Kurt, and an Italian television mini-series, Una pistola in vendita, followed in 1970.