This book is an interesting look at the scientific data in the field of parapsychology. It examines ghost hunting as a cultural and scientific phenomenon, sidestepping the many issues surrounding the reality of ghosts, and discussing the many and varied methods used by ghost hunters. The writers of this work take the approach that there is no such thing as the supernatural, only things we don't yet understand. The ghost experience is examined through case studies; the forms and functions that ghost hunters have taken down through history are analyzed; key historical figures and their influence on the research of ghostly phenomena are reviewed; ghost hunting in the 21st century, including the exploding phenomenon of Internet ghost-hunting organizations, is discussed; and the advances in the theory and technology of the parapsychology field are covered. For those who are skeptical about the reality of ghosts but who want to understand how so many individuals claim to have anomalous experiences, this book reviews the data, offers insight into logical explanations, and discusses why this is and has been for centuries such an important issue to humans.