Unexplained
Strange Sightings, Incredible Occurrences, and Puzzling Physical Phenomena »

Take Me Out, Coach
I'M Embarrassed To Play »

Cryptozoology A to Z
The Encyclopedia of Loch Monsters, Sasquatch, Chupacabras and Other Authentic Mysteries of Nature »

The Ufo Encyclopedia
Details aspects of unidentified flying objects from ancient times to the present, with 273 entries on the cases, the theories, the organizations, the investi... »

The Unidentified & Creatures Of The Outer Edge
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Hidden Realms, Lost Civilizations, And Beings From Other Worlds
Hidden Realms, Lost Civilizations, and Beings from Other Worlds »

Unnatural Phenomena
A Guide to the Bizarre Wonders of North America »

Extraordinary Encounters
An Encyclopedia Of Extraterrestrial And Otherworldly Beings »