Few people are aware that Dennis Wheatley, in his day one of the biggest selling novelists in the world, spent the Second World War as a member of Winston Churchill's Joint Planning Staff. Wheatley's job was to confuse the enemy by writing 'plausible, official documents' and to feed them to the Nazis. Here is that little known and intriguing story, drawn on previously unpublished restricted papers - and with a foreword by one of today's best-selling authors.