What Are (and Are Not) Ghosts? -- Lands of the Dead: Early Sightings -- Rattling Chains and White Sheets: Ghosts in the Western World -- Hungry Ghosts: The Eastern World -- La Llorona and Dreamtime: Ghosts in Latin America and the Southern Hemisphere -- The Quest for Evidence: The Ghost and Science -- From King Richard to Paranormal Activity: The Ghost in Literature, Film and Popular Culture -- Conclusion: The Ubiquitous Ghost.