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Tinker Tailor Soldier Spy is a 1974 spy novel by the author and former secret intelligence officer John le Carré. It follows the endeavours of the taciturn, ageing spymaster George Smiley to uncover a Soviet mole in the British Secret Intelligence Service. The novel has received critical acclaim for its complex social commentary—and, at the time, relevance, following the defection of Kim Philby. It was followed by The Honourable Schoolboy in 1977 and Smiley's People in 1979. The three novels together make up the "Karla Trilogy", named after Smiley's long-time nemesis Karla, the head of Soviet foreign intelligence and the trilogy's overarching antagonist. The novel has been adapted into both a television series and a film, and remains a staple of the spy fiction genre. In 2022, the novel was included on the "Big Jubilee Read" list of 70 books by Commonwealth authors, selected to celebrate the Platinum Jubilee of Elizabeth II.