For a brief time in a Europe threatened and then occupied by Nazi Germany, jazz was heard as ubiquitously as rock ' n' roll is today. In a personal search for the story of that time, Mike Zwerin spent two years traveling across Europe talking with individuals who performed and enjoyed jazz in Hitler's dark shadow, including the Ghetto Swingers, a Jewish jazz band that "toured" Auschwitz and Theresienstadt; the Luftwaffe pilot who listened to Glenn Miller while bombing London; Django Reinhardt, the brilliant guitarist who refused to flee Nazi-controlled France; and many others.