Tradition 20 of 33
UFOs, extraterrestrials, and contact
UFO/UAP reports, flying saucers, extraterrestrial life, alien contact or abduction, contactees, and ancient-astronaut claims.
Membership means relevance, not endorsement.
- Books
- 1,058
- Earliest
- 1558
- to 2026
- Read free
- 22%
- 236 with public full text
- With covers
- 58%
How books qualify
- Query + metadata match981
- Metadata match69
- Query match7
- Source classification (retained through merging)1
Every placement records its evidence — the controlled subject queries that found the book at its sources and the bibliographic metadata retained through merging. Each book page shows its own. How the rationale system works.
Key subjects
- Fiction324
- Science fiction258
- Extraterrestrial beings247
- Human-alien encounters220
- Unidentified flying objects204
- UFO128
- Alien abduction101
- Short Stories92
- Physical Sciences86
- Social Sciences83
- Astronomy and Astrophysics82
- Physics and Astronomy82
- Life on other planets81
- Children's fiction80
- Sightings and encounters79
- Space Science and Extraterrestrial Life78
- Fiction, science fiction, general77
- Juvenile fiction74
- History69
- Philosophy68
- Psychology68
- Extraterrestrial beings, fiction62
- Social Psychology52
- 未確認飛行物体46
Top languages
- English771 · 73%
- German85 · 8%
- Japanese48 · 5%
- French31 · 3%
- Dutch29 · 3%
Notable authors
All authors- Jacques Vallee14 in this tradition15 books
- Katherine Applegate12 books
- M. de Fontenelle11 in this tradition12 books
- Bernard Le Bovier de Fontenelle9 in this tradition15 books
- Virgil Finlay8 in this tradition12 books
- Ed Emshwiller7 in this tradition11 books
- George Adamski7 books
- Orson Scott Card6 in this tradition8 books
- Pittacus Lore6 in this tradition7 books
- Donald E. Keyhoe6 books
- Marissa Meyer6 books
- Robert A. Heinlein6 books
1,058 books
Strangely Enough! (abridged)
1967
Akte Aliens
Andrew Donkin
1999
Akte UFO
Courtlandt Dixon Barnes Bryan
1999
Alchemy: science of the cosmos, science of the soul
Titus Burckhardt
1967
Near-Death Experiences
Birk Engmann, Бирк Энгманн
2014
The UFO mystery solved
Steuart Campbell
1994
The biological universe
Steven J. Dick
1996
UFO 1665
Moritz Wullen
2023
Alien Abductions
Sarah Moran
2000
Final report of the scientific study of unidentified flying objects conductedby the University of Colorado under contract to the United States Air Force
Daniel S. Gillmor
1969
Flying saucers through the ages
Paul Thomas
1965
Grays, Alien Abductions and Genetic Creation of Humans Hybrids Race
Maximillien De Lafayette
2010
Intercept--but don't shoot
Renato Vesco
1971
Mirrikh, or, A woman from Mars
Francis Worcester Doughty
1892
Mysteries of the skies
Gordon Ira Rupert Lore
1969
Planet of Peril
Otis Adelbert Kline
1929
The sky people
Brinsley Lord Clancarty Le Poer Trench
1960
UFOs
Ray Clarington, Robert Kent
2015
... dann kamen die UFOs
Lars A. Fischinger
2001German
10000 Jahre UFOs
Reinhard Habeck
2001German
Aliens
Johannes Fiebag
1999German
Aliens auf dem Teufelsberg
Barbara Büchner
2000German
Außerirdische und was Sie darüber wissen sollten
Peter Leibundgut
2011German
Begegnungen mit außerirdischen Intelligenzen
Richard L. Thompson
1997German