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
Prisoner of the Ant People
R. A. Montgomery
1983
- Read free
La pluralité des mondes habités; étude où l'on expose les conditions d'habitabilité des terres célestes, discutées au point de vue de l'astronomie, de la physiologie et de la philosophie naturelle
Camille Flammarion
1869French
- Read free
The Dung Ball Chronicle
Wayne V. Miller
2014
The Message
Katherine Applegate
1996
From archaeology to archaeologies
Anna Simandiraki-Grimshaw
2012
Give Yourself Goosebumps - Secret Agent Grandma
Robert Lawrence Stine
1997
The Computer Nut
Betsy Cromer Byars
1984
The Conspiracy
Katherine Applegate
1999
Wizard's Holiday
Diane Duane
2003
Aliens Ate My Homework
Bruce Coville
1993
Five alien elves
Gregory Maguire
1673
Goosebumps Series 2000 - Earth Geeks Must Go!
Robert Lawrence Stine
1999
The Alien
Katherine Applegate
1997
The pool of fire
Sam Youd
1968
Beegu
Alexis Deacon
2004
The Dark Side of Nowhere
Neal Shusterman
1997
The Departure
Katherine Applegate
1998
The Forgotten
Katherine Applegate
1997
The Invasion
Katherine Applegate
1996
The Predator
Katherine Applegate
1996
The Proposal
Katherine Applegate
1999
The Stranger
Katherine Applegate
1795
The Underground
Katherine Applegate
1998
The Unknown
Katherine Applegate
1998