Ivor Jones' new book vividly describes the cunning night-time decoys which saved Cardiff, and indeed Wales itself, from German bombings during the Second World War. By distorting what the German bombers could see from the air, the Ministry of Home Security was successful in averting hundreds and thousands of bombs from residential areas of the country. False 'lights' were created to mislead German bombers in search of targets; during the blackout, the ministry placed these lights in open countryside, or around the coast. Superbly illustrated with photographs and maps, this is a fascinating insight into a previously overlooked aspect of the Second World War.