Code Girls: The Untold Story of the American Women Code Breakers of World War II

I'm in the middle of this one right now. This is the story of the American female code breakers whose vital work helped win World War II, but whose work has gone unsung for decades. 10,000 American women served the U.S. Army and Navy as cryptanalysists; their call to action came in the form of a letter that asked them two short questions: did they like crossword puzzles, and were they engaged to be married? A fascinating, thoroughly researched, and well-told true account.