The Enigma story

"The Enigma cipher was supposed to be the German's impenetrable [defense] for its military communications against prying eyes during World War II. This is the . . . story of how the cipher was created, adopted by the Nazis, and finally broken. Dermot Turing, the nephew of the great codebreaker Alan Turing, explores the twists and turns of German encryption efforts from the end of World War I through to Hitler's demise and the great lengths to which the Allies went to break it"--Provided by publisher.