The award-winning New York Times bestseller about the American women who secretly served as codebreakers during World War II--a "prodigiously researched and eng

"This is the story of the Allied codebreakers puzzling through the most difficult codebreaking problems that ever existed.

Discover the true stories of code breakers who worked behind the scenes during World War II. Men and women cracked enemy codes in order to gain information that

The story of Bletchley Park, the successful intelligence operation that cracked Germany's Enigma Code. Photos.

The dramatic, untold story of the brilliant team whose feats of innovation and engineering created the world’s first digital electronic computer—decrypting