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Battle of Wits
The Complete Story of Codebreaking in World War II
By Budiansky, Stephen
Descripton: Comprehensive overview of British and American codebreaking activities in World War II, starting off with a look at WWI and between-wars intelligence; includes technical data on Enigma. Uses war records from German sources and data from Bletchley Park. Includes glossary, extensive bibliography, and five appendices: Chronology; Naval Enigma; Cryptanalysis of the Purple Machine; The Intercept Network; Rapid Analytical Machinery (RAM). Good resource book and also a good read.