Sách nói: Historic Ghosts and Ghost Hunters

The author describes popular ghost occurrences from a skeptical point of view, providing explanations based on recent scientific research (early 20th century), primarily in the field of psychology, like suggestion and hallucinations, using also his beliefs on mesmerism and telepathy. He finishes his book with a brief mention of ghost hunters and researchers into psychic phenomena. - Summary by Rapunzelina