It’s common knowledge that the Enigma cipher was broken at Bletchley Park, but less is known of the background: an exhilarating spy story of secret documents smuggled across borders, hair-raising escapes, Gestapo interrogations and betrayals.

At the heart of it is the decisive role of Polish mathematicians and French spymasters who helped Britain’s codebreakers change the course of the Second World War. X, Y & Z is the real story of how Enigma was broken.

Prizes

Winner of Warsaw Guardian of Memory 2019

DERMOT TURING is the author of X, Y and Z: the Real Story of how Enigma Was Broken; Alan Turing Decoded; and Enigma Traitors, which reveals the inadequacies of Allied codes during the Second World War. He began writing in 2014 after a career in law. He is a trustee of The National Museum of Computing and a Visiting Fellow at Kellogg College, Oxford. Dermot is married with two sons and lives in Kippen in Stirlingshire.