Unexplained!: 347 Strange Sightings, Incredible Occurrences, and Puzzling Physical Phenomena

Strange and Unexplained Phenomena (ANOMOL

Unexplained Mysteries of the 20th Century

Mind & Magic: An Illustrated Encyclopedia of the Mysterious and Unexplained

Oddities a Book of Unexplained Facts

Investigating the Unexplained

The X Files Book of the Unexplained, Vol 2

The X-Files Book of the Unexplained (X-Files (HarperCollins Age 12-Up))

Explaining the Unexplained: Mysteries of the Paranormal

The World Atlas of the Unexplained