01196cam a2200277 4500 121223764 TxGeo 20121206120000.0 120507s2012||||||||||||||||||||||||eng|u 2012018408 9780452298712 pbk. 0452298717 pbk. (OCoLC)785077598 DLC DLC TnLvILS TxGeo McKay, Sinclair. The secret lives of codebreakers : the men and women who cracked the Enigma code at Bletchley Park / Sinclair McKay. New York, NY : Penguin Group, 2012. 338 p., [8] p. of plates : ill. ; 21 cm. Previous ed.: The secret life of Bletchley Park : the WWII codebreaking centre and the men and women who worked there / Sinclair McKay, 2010. 20121212. Great Britain Government Communications Headquarters History. World War, 1939-1945 Cryptography. World War, 1939-1945 Electronic intelligence Great Britain. Bletchley Park (Milton Keynes, England) History. QS5