The Spy Who Came in from the Cold is a 1963 Cold War spy novel by British author John le Carré. It has become famous for its portrayal of Western espionage methods as morally inconsistent with Western democracy and values. The novel received critical acclaim at the time of its publication and became an international best-seller; it was selected as one of the All-Time 100 Novels by Time magazine. In 2006, Publishers Weekly named it the "best spy novel of all-time”.
In 1965, Martin Ritt directed the cinematic adaptation The Spy Who Came in from the Cold, with Richard Burton as Alec Leamas.