
The Spy Who Came In from the Cold occurs during the heightened tensions that characterised the late 1950s and early 1960s Cold War, when a Warsaw Pact– NATO war sparked in Germany seemed likely. Characters and events from The Spy Who Came In from the Cold are revisited in A Legacy of Spies, le Carré's 2017 novel centering on an aging Guillam.

In 1965, Martin Ritt directed a cinematic adaptation, with Richard Burton as Leamas. 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. The Spy Who Came In from the Cold portrays Western espionage methods as morally inconsistent with Western democracy and values. It serves as a sequel to le Carré's previous novels Call for the Dead and A Murder of Quality, which also featured the fictitious British intelligence organization, "The Circus", and its agents George Smiley and Peter Guillam.


It depicts Alec Leamas, a British agent, being sent to East Germany as a faux defector to sow disinformation about a powerful East German intelligence officer. The Spy Who Came in from the Cold is a 1963 Cold War spy novel by the British author John le Carré.
