This is a vintage original hardback edition first printing of MYSTERIES OF THE UNKNOWN: SPIRIT SUMMONINGS. Published in 1988 by Time-Life Books, this volume discusses discusses mediums and seances. Topics include the Fox Sisters, Daniel Dunglas Home, and Harry Houdini's debunking of mediums. This 9.25 x 11.25 in. hardback book consists of 160 pages with great black-and-white and full-color photographs and illustrations. It is in "Like New" condition with some rubbing on the front cover artwork. Mysteries of the Unknown is a 33-volume series of books about the paranormal, published by Time-Life Books from 1987 through 1991. Each book focused on a different topic, such as ghosts, UFOs, psychic powers, and dreams. The series was very successful for Time-Life Books, and the idea was conceived following the popularity of the publisher's previous Enchanted World series of books. However, unlike the definite supernatural orientation of The Enchanted World series, the Mysteries Of The Unknown series did all it could to keep its subject matter as grounded in scientific aspects as was possible for the subject. Within 15 months of the series' release, it had broken every sales record for the company.