A Best Book of 2021 by Bloomberg BusinessWeek, Time, and The Washington Post The bestselling author of Leonardo da Vinci and Steve Jobs returns with a “compel

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

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

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

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