Phenomena -Unexplained! : Strange Sightings, Incredible Occurrences and... "Phenomena - Unexplained!: Strange Sightings, Incredible Occurrences and Puzzling Physical Phenomena" is a trade paperback book in the Phenomena Ser. Written by Jerome Clark, this nonfiction almanac delves into unexplained phenomena, making it suitable for adults interested in the mysterious and the supernatural. Published by Visible Inkpress in 1998, this revised edition features illustrations and a total of 672 pages filled with intriguing stories and phenomena from the world of science and the unknown.