Cryptozoology A to Z
2008
Unexplained!
1993
The UFO book
1997
The UFO encyclopedia
1990
Ufo Encounters
1992
Encyclopedia of strange and unexplained physical phenomena
1993
Strange & unexplained happenings
1995
Creatures of the goblin world / by Jerome Clark and Loren Coleman
Hidden realities, lost civilizations, and beings from other worlds
2010
Strange & unexplained phenomena
1997
Hidden realms, lost civilizations, and beings from other worlds
2010
Extraordinary encounters
2000
Strange Skies
2003
Strange and Unexplained Phenomena (ANOMOL
The UFO files
1996
The UFO Encyclopedia, 3rd Ed.
2018
The UFO Encyclopedia, 4th Ed.
2023
Creatures of the outer edge
1978
The emergence of a phenomenon--UFOs from the beginning through 1959
1992
High strangeness
1996
Take Me Out, Coach
2005
UFO encounters & beyond
1993
