Expatriates posing as detached yet patriotic American commentators, and using the news-of-the-day voice of the stereotypical radio announcer, sought to turn U.S. opinion against the British and achieve the political objectives of their media-savvy employer--master propagandist Paul Josef Goebbels. Riveting biographies in Berlin Calling put real names and faces behind the voices of The Georgia Peach, Mr. O.K., Paul Revere, and others. Were...