The Spy Who Came In from the Cold, written by John le Carré, is a classic espionage novel that explores the world of Cold War surveillance and espionage. The story follows Alec Leamas, a British intelligence officer, as he embarks on a dangerous mission to bring down a high-ranking East German intelligence officer. Le Carré's atmospheric and morally complex narrative delves into the murky world of spies, double agents, and the toll that surveillance takes on individuals.