He introduces key figures on both sides of the battle including: Arthur Scherbius, who gave the Germans a boost in the race between codemaker and codebreaker and Polish mathematician Marian Rejewski, who reconstructed the Enigma keys.
One the best and most complete accounts of cryptography yet published released in paperback for the first time
The first full account of Hitler's extensive intelligence network-and the dramatic story of how Germany lost the battle of the secret services in World War II.