In 1942, the U.S. Army unleashed one of its greatest secret weapons in the battle to defeat Adolf Hitler: training nearly 2,000 German-born Jews in special interrogation techniques and making use of their mastery of the German language, history and customs. Known as the Ritchie Boys, they were sent in small, elite teams to join every major combat unit in Europe, where they interrogated German POWs and gathered crucial intelligence that saved American lives and helped win the war. Bruce Henderson draws on personal interviews with many surviving veterans and extensive archival research to bring this never-before-told chapter of the Second World War to light.