The original history of Bletchley Park's Hut 6 was considered so sensitive, it was only declassified in June 2006. For the first time, the wider public can read the true true of Bletchley Park's epic battle with the Enigma code of the German Army and Air Force as written in the codebreakers and edited by John Jackson. The true account of this momentous struggle is told anonymously by the Bletchley Park codebreakers working in Hut 6, who recorded their experiences in a top secret military history at the end of World War 2. Where the German forces went the Enigma machine went with them. The daily changing cipher keys and the continuous security improvements put a continual strain on the quiet heroes of Bletchley Park. This specially edited version of the original three volumes, which includes the entire volume on cryptography, is a lasting tribute to their unrelenting pursuit of the innermost secrets of the Nazi armed forces and to their genius in overcoming all the odds. The original reports were written after the war to document how the Enigma code was broken and includes complex technical descriptions and is A fascinating read for anyone interested in Bletchley Park, the Enigma code, military intelligence, or cryptography.