On orders from President Franklin D. Roosevelt, the Department of War built hundreds of POW camps in the United States. Ardent Nazis in the camps attacked fellow Germans they deemed disloyal. Fifteen were sentenced to death for acts of murder. German authorities condemned fifteen American POWs to the same fate and proposed a trade: fifteen German lives for fifteen American lives. Journalist and author William Geroux shines a spotlight on this story of murder and high-stakes diplomacy, and on the fifteen American lives that hung in the balance.