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Dilly: The Man Who Broke Enigma by Mavis Batey (Hardcover, 2009)

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Dilly: The Man Who Broke Enigmas. Used - Acceptable: All pages and the cover are intact, but shrink wrap, dust covers, or boxed set case may be missing. Item may but the dust cover may be missing. Pages may include limited notes and highlighting, but the text cannot be obscured or unreadable.

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Alfred Dillwyn Knox, known as Dilly, was Britain's leading wartime codebreaker, a famously eccentric and temperamental genius who cracked German ciphers in both wars. The son of a famous religious scholar, Knox worked in the Admiralty's Room 40 codebreaking operation during the First World War, breaking the German Admiral's Flag Code, and between the wars he deciphered the text of the Herodas papyri and broke the Enigma cipher machine used by Franco's royalist forces in the Spanish Civil War. During the Second World War Knox became Britain's chief cryptographer, working in a cottage at the world-famous Bletchley Park assisted only by his 'girls', the best of the young female codebreakers available to him. Knox's work would eventually provide the solution to German secret service Enigma cipher, playing a key part in the Double-Cross deception system which ensured the success of the 1944 D-Day landings. Dilly is a compelling and affectionate portait of a great British eccentric and a fascinating and detailed behind-the-scenes look into codebreaking and the hidden side of war. This is a tale from the inside by one of the few surviving protagonists and goes into unprecedented detail about the mechanics of the enigma machines and how their encipherment was achieved.