Bletchley Park was the site of Britain's main decryption center, the Government Code and Cypher School. This extraordinary book includes essays by some of Britain's foremost historians and academics and traces the legacy of Bletchley Park from the innovative work which led to the breaking of Enigma and other wartime codes to the invention of modern computing and its influence on Cold War codebreaking.

Crucially, it also features contributions from former Bletchley Park codebreakers, whose personal reminiscences and very human stories of life and work in wartime Bletchley make compelling reading.

Michael Smith is the author of Killer Elite.

Ralph Erskine is one of Britain's leading historians of wartime codebreaking.