The paranormal has gone mainstream. Beliefs are on the rise, with almost half of the British population, and two thirds of Americans, claiming to believe in extra sensory perceptions and hauntings. Psychic magazines like Spirit and Destiny, television shows such as Fringe, Ghost Whisperer and Most Haunted, ghost-cams and e-poltergeists, bestselling books on mind, body and spirit, and magicians like Derren Brown have moved from...