Taking us through the key hauntings that have obsessed the world, Roger Clarke unfolds a story of class conflict, charlatans, and true believers. The cast list includes royalty and prime ministers, Samuel Johnson, John Wesley, Harry Houdini, and Adolf Hitler.  There are haunted WWI submarines, houses so blighted by phantoms they are demolished, a seventeenth-century Ghost Hunter General, and the emergence of the Victorian flash mob, where hundreds would stand outside rumored sites all night waiting to catch sight of a dead face at a window.