Created in the aftermath of World War II, the Central Intelligence Agency relied on women even as it attempted to channel their talents and keep them down. They were unlikely spies, which is exactly what made them perfect for the role. Because women were seen as unimportant, pioneering female intelligence officers moved unnoticed around Bonn, Geneva and Moscow, stealing secrets from under the noses of their KGB adversaries. Back at headquarters, women built the CIA’s critical archives --- first by hand, then by computer. And they noticed things that the men at the top didn’t see. As the CIA faced an identity crisis after the Cold War, it was a close-knit network of female analysts who spotted the rising threat of al-Qaeda --- though their warnings were repeatedly brushed aside.

Recruited by the U.S. Army and Navy from small towns and elite colleges, more than 10,000 women served as code breakers 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, Liza Mundy brings to life this riveting and vital story of American courage, service and scientific accomplishment.