"Is there anybody out there?" No matter how rationally we order our lives, few of us are completely immune to the suggestion of the uncanny and the fear of the dark. What explains sightings of ghosts? Why do they fascinate us? What exactly do those who have been haunted see? What did they believe? And what proof is there? Taking us through the key hauntings that have obsessed the world, from the true events that inspired Henry James's classic The...