

By the time Hodges-a British mathematician and author-reaches this point in Turing’s life, he has already begun to examine his subject’s budding sexuality, quoting liberally from a 1912 primer titled Natural Wonders Every Child Should Know, which Turing received at age ten. Born in 1912, Turing attended the Sherborne School and King’s College at Cambridge University. But it also reflects Turing’s difficult-to-decipher personality. The subtitle, of course, refers to the famous cryptographic machine used by the Germans during the Second World War to stymie the Allies.

This book was originally published in 1982 and reissued in 2012 for the centennial of Turing’s birth. For anyone whose interest in the pioneering computer scientist, mathematician, and logician was piqued by the film, the book that served as the film’s source material, Andrew Hodges’s exhaustive biography Alan Turing: The Enigma, has the answers. During the past year, thanks to the movie The Imitation Game, Alan Turing has emerged from history’s shadows, where his memory had languished for decades.
