Nazi propaganda presented Adolf Hitler as ascetic, solitary and a brilliant Führer. Only a few knew the real man behind World War II. His mystery has fuelled numerous conspiracy theories – like why Hitler's own decisions were sometimes was so strange that neither his contemporaries nor posterity can explain the Führer's bizarre choices. Why did he turn the Luftwaffe's terror bombing of Britain from military targets to civilian ones? Why did Hitler issue the Wehrmacht with a stop order just before Dunkirk? And why did he hate Jews so much that millions of people died? This issue gets close to World War II's unsolved mysteries and gives historians its best guess at some of the answers.