John le Carré (1931–2020), born David Cornwell, was a British novelist whose work transformed modern spy fiction. He studied at the University of Bern and Lincoln College, Oxford, taught at Eton, and later worked for Britain’s intelligence services, MI5 and MI6. His experience in intelligence gave his novels an unusual understanding of secrecy, surveillance, and the psychological pressures faced by spies. His third novel, The Spy Who Came in from the Cold, was published in 1963 and established his international reputation. He went on to write celebrated works including Tinker Tailor Soldier Spy, The Little Drummer Girl, The Constant Gardener, and The Night Manager. Across a career spanning six decades, le Carré explored the moral ambiguities of espionage, the failures of political institutions, and the personal costs of loyalty and betrayal. His novels remain influential for portraying intelligence officers not as glamorous heroes, but as complicated people caught in systems beyond their control.