Code girls - Liza Mundy

The award-winning New York Times bestseller about the American
women who secretly served as codebreakers during World War II--a "prodigiously researched and engrossing" (New York Times) book that "shines a light on a hidden chapter of American history" (Denver Post).

Recruited
by the U.S. Army and Navy from small towns and elite colleges, more
than ten thousand women served as codebreakers during World War II.
While their brothers and boyfriends took up arms, these women moved to
Washington and learned the meticulous work of code-breaking. Their
efforts shortened the war, saved countless lives, and gave them access
to careers previously denied to them. A strict vow of secrecy nearly
erased their efforts from history; now, through dazzling research and
interviews with surviving code girls, bestselling author Liza Mundy
brings to life this riveting and vital story of American courage,
service, and scientific accomplishment.