The IPCRESS File is Len Deighton's first spy novel, published in 1962. The story involves Cold War brainwashing, includes scenes in Lebanon and on an atoll for a United States atomic weapon test, as well as information about Joe One, the Soviet Union's first atomic bomb. The story was made into a film in 1965 produced by Harry Saltzman, directed by Sidney J. Furie and starring Michael Caine; and a 2022 TV series, starring Joe Cole, Lucy Boynton and Tom Hollander.

Leonard Cyril Deighton is a British author. His publications have included cookery books and works on history, but he is best known for his spy novels.