Daishū Shobō (Publisher) Four-Dimensional Series World Non-Fiction Series Occult & Four-Dimensional Series "Secrets of the Century" M. Agrest et al., Translated by Gentaro Koizumi First Edition, 1970 "Challenge to the Sixth Dimension" Hidehiko Tsushima, First Edition, 1972 "Spaceships to Prehistory" Peter Kolosimo, First Edition, 1974 "Unknown Planets" Peter Kolosimo, Revised Edition, 1973 "Occult Prophecies" Stewart Lipton, Revised Edition, 1974 "Traces of Extraterrestrials" Peter Kolosimo, First Edition, 1973 "Mysteries of the Universe" Ryohei Mizuno, 3rd Edition, 1974 "Messengers of the Universe" Morihiro Saito, First Edition, 1973 "Shocking Four Dimensions" John Macklin, First Edition, 1973 "Four-Dimensional Phenomena of the World I" Junichi Takanashi, First Edition, 1971 "Four-Dimensional Phenomena of the World III" Junichi Takanashi, First Edition, 1972 "Strange Phenomena of Other Dimensions" Hiroshi Minamiyama, First Edition, 1971 "Lost Science" Morihiro Saito, Revised Edition, 1973 "Mysterious World" Morihiro Saito, 3rd Edition, 1971 "Supernatural World" Hiroshi Minamiyama, First Edition, 1970 "Surreal World" Hiroshi Minamiyama, First Edition, 1971 That's a total of 16 books. Some may have stains, yellowing, or folds. These are items that have been stored for a long time. Please handle them as a set. #Extraterrestrial #Occult #SF #FourDimensional #Mystery