Apparitions is most influential in categorizing ghosts. These four categories include experiments, crisis, post-mortem and ghosts. Tyrrell's classification of phantoms is an interesting and thought provoking one, his system is been continued in its use today, demonstrating that he was ahead of his time.Tyrrell develops the idea that the apparition may be a way for the unconscious part of the mind to bring to consciousness information that has been paranormally acquiredin crisis cases, for example. He introduces an evocative metaphor of a mental 'stage-carpenter', behind the scenes in the unconscious part of the mind, and constructing the quasi-perceptual experience that eventually appears on the stage of consciousness, so that it embodies paranormal information in a symbolic way. Tyrell first introduced the term out-of-body-experience in this book.The Paranormal, the new ebook series from F&W Media International Ltd, resurrecting rare titles, classic publications and out-of-print texts, as well as new ebook titles on the supernaturalother-worldly books for the digital age. The series includes a range of paranormal subjects from angels, fairies and UFOs to near-death experiences, vampires, ghosts and witchcraft.