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
The End of All Things
John Scalzi
2015
The Everborn
Nicholas Grabowsky
2002
The Flood (Halo)
William C. Dietz
2003
The Gentle Giants of Ganymede
James P. Hogan
1978
The Grays
Whitley Strieber
2006
The Hollow Earth
Raymond Bernard
1969
The Humans
Matt Haig
2013
The Interrupted Journey
John Grant Fuller
1966
The Kraken Wakes
John Wyndham
1953
The Line of Polity
Neal L. Asher
2003
The Man Who Fell to Earth
Walter S. Tevis
1963
The Martian Way and Other Stories
Isaac Asimov
1955
The Outrageous Views of Professor Fogelman
Vin Smith
2004
The Redemption of Time
Baoshu
2019
The Stranger at the Pentagon
Frank E. Stranges
1967
The Swarm
Orson Scott Card, Aaron Johnston
2016
The Three Waves of Volunteers and the New Earth
Dolores Cannon
2011
The UFO encyclopedia
Jerome Clark
1990
The UFO enigma
Donald Howard Menzel
1977
The UFO invasion
Kendrick Frazier, Joe Nickell
1997
The UFO phenomenon
Time-Life Books
1987
The Voyage of the Space Beagle
A. E. van Vogt, Bruce Jensen
1950
The World's Greatest Alien Abduction Mysteries
Inc. Book Sales
2002
The alien abduction files
Kathleen Marden
2013