The Third Reich is Listening: Inside German Codebreaking 1939-45

The cracking of Enigma by codebreakers at Bletchley Park was a key step on the Allies' road to victory in World War II - but this is just one side of the story. Across the Channel, German signals intelligence agencies had been hard at work breaking British, Russian, and French codes even before the war broke out

Drawing on recently declassified documents and extensive research, foreign correspondent and author Christian Jennings tells the engrossing inside story of the Third Reich's top-secret codebreaking operation.