World War II espionage and propaganda stories are just about the richest in history and Sefton Delmer's book is a welcome and valuable addition to such literature. Delmer, a German expert, writing for British newspapers, conceived the idea of a ""Black Radio"" in 1941 to confuse and undermine the Germans in Europe. Its broadcasts reached German soldiers in the field, U-boat crews at sea, and civilians in Germany itself. A really fascinating study in politics and propaganda.