Jerome Clark

• Cryptozoology A to Z
• The UFO encyclopedia
• Unexplained!
• Encyclopedia of strange and unexplained physical phenomena
• The UFO book
• Ufo Encounters
• Cryptozoology A to Z
• Strange & unexplained happenings
• Unexplained!
• Hidden realms, lost civilizations, and beings from other worlds
• Strange & unexplained phenomena
• Strange Skies