- Cryptozoology A to ZLoren Coleman, Jerome Clark
- Unexplained!Jerome Clark
- The UFO encyclopediaJerome Clark
- The UFO bookJerome Clark
- Cryptozoology A to ZJerome Clark
- Encyclopedia of strange and unexplained physical phenomenaJerome Clark
- Ufo EncountersJerome Clark
- The UFO filesJerome Clark
- Strange & unexplained happeningsJerome Clark, Nancy Pear
- Hidden realities, lost civilizations, and beings from other worldsJerome Clark
- Hidden realms, lost civilizations, and beings from other worldsJerome Clark
- Strange & unexplained phenomenaJerome Clark
- Strange SkiesJerome Clark
- Extraordinary encountersJerome Clark
- The UFO Encyclopedia, 3rd Ed.Jerome Clark, Angela L Williams
