A collection of the twenty greatest mysteries, according to the authors' perspective. The book records phenomena and events that defy the laws of physics, recorded history, and the laws of probability, creating an enigmatic puzzle of uninterpreted phenomena and strange narratives, from the Holy Light, Crop Circles, and the Shroud of Turin, to Atlantis, the Sphinx, Crystal Skulls, Spirit Recordings, Drosoulites in Crete, and many more.