Black propaganda appears over a fake signature, for example of a fictitious resistance organization. In this book, the author examines the "black arts" of Britain, Poland and the Nazis during the Second World War. By 1939, Josef Goebbels had won the struggle for control of the propaganda process in Nazi Germany. In contrast, it took the arrival of Sefton Delmer in 1941 for anyone in Britain to understand how to use propaganda to subvert the German war effort. Through the shadowy Political Warfare Executive, the "black" radio stations Delmer created lured German listeners with jazz and pornography (both banned), mixed with subversive rumors. Millions of "black" leaflets - perfect forgeries of German documents, with subtly altered texts - were produced, their aim to encourage malingering, desertion and sabotage. Black Propaganda explains how even before the outbreak of the Second World War, British and Polish intelligence had worked closely together on a number of key security issues that included the 'Enigma' machine and the German V-weapons program. Following the occupation of their country, the Poles also became actively involved in the dissemination of black propaganda against Germany.