In the 1940s, thousands of smart young American women were recruited and meticulously trained for top-secret military operations deciphering encrypted enemy messages. Their compelling stories remained untold for decades, but reporter Liza Mundy dove into now-declassified U.S. Army and Navy archives—and interviewed many of the surviving servicewomen—to deliver a breathtaking history of the remarkable Code Girls. The fascinating complexities of their jobs and the intense drama of the times make for page-turning prose. These long-underappreciated women were instrumental to winning the war, and this extraordinary book honors their lives and accomplishments with precision and brio.