The fascinating true history of ghosts - how we see them and why we believe in them, from Roger Clarke What explains spectral sightings? Why do we fear the supernatural? What proof is there? Growing up in a haunted house, Roger Clarke spent much of his childhood trying to see a ghost. From the terrifying true events behind Henry James's The Turn of the Screw to the frenzy of the Cock Lane poltergeist, he takes us on a journey of belief with ghosts of every kind.