From the Chaosium website: A Monograph for the 1890's, 1920's, & Contemporary Adventures This monograph reveals the real-world science of the paranormal, Parapsychology (its history and methods), how to play a parapsychologist, how to run a Call of Cthulhu campaign centered around a ghost-hunting group, and how to simulate various non-Mythos entities and psychic powers in your campaign. Contents: Parapsychology Exploring New Prontiers of Science Parapsychology Parapsychology in the Laboratory Generating a Parapsychologist Character Phenomena Paradigms—Theories of the Unexplained Ghosts and Hauntings Investigating Poltergeists Spiritualism and Mediumship Psychical Research Secrets Mankind Was Not Meant to Know Running a Parapsychological Campaign Ghosts: a Keeper's Guide The Poltergeist Scenario Mediumship Explored Psychics Cthulhu Rising: Cthulhu and the Psychic Appendix A: Sinister Seeds Appendix B: New D20 Cthulhu Psychic Feats Appendix C: Parapsychological Literature, 1882–1930