This book explores various explanatory frameworks for paranormal encounters. It opens with the story of an inexplicable human figure seen crossing a secluded hotel corridor, interpreted as a ghost by the sole witness. The subsequent chapters explore the three most important historical perspectives accounting for this and other types of paranormal experience. Each perspective is examined from first principles, with specific reference to what happened in the corridor, how it happened, why it happened, and who might be responsible. The first perspective considers the experience to be legitimate – to be something real – and various possibilities are presented that are grounded in the paranormal and parapsychological literature, among which a “g...