World War II Radio Heroes: Letters of Compassion is a book by psychologist Lisa Spahr, co-authored with Austin Camacho, that recounts her personal investigation of the activities of shortwave radio listeners who notified families of captured U.S. military personnel of their status as prisoners of war during World War II. It documents Spahr's search to locate and thank the listeners who wrote letters to her great-grandmother reporting details of her grandfather's capture and internment in a German prison camp in 1943.