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
Raechel's eyes
Helen E. Littrell, Helen Littrell, Jean Bilodeaux
2004
Rama II
Arthur C. Clarke, Gentry Lee
1989
Reaching for reality
Constance Clear
1999
Redshirts
John Scalzi
2012
Revelations
Jacques Vallee
1991
Roswell Incident
Charles Berlitz
1980
Seed to Harvest
Octavia E. Butler
2007
Shadow of the Scorpion
Neal L. Asher
2008
Silent Invasion
Ellen Crystall, Philip J. Imbrogno
1991
Situation red, the UFO siege!
Leonard H. Stringfield
1977
Slave masters
Susan Wright
2004
Spin
Robert Charles Wilson
2005
Synthetic Men of Mars
Edgar Rice Burroughs
1940
Terminal alliance
Jim C. Hines
2017
The 4400
Greg Cox
2008
The Abduction Enigma
Kevin D. Randle, Russ Estes, William P. Cone
1999
The Aliens and the Scalpel
Roger K. Leir
1998
The Allagash abductions
Raymond E. Fowler
1993
The Andreasson affair, phase two
Raymond E. Fowler
1982
The Andreasson legacy
Raymond E. Fowler
1997
The Candle of Distant Earth
Alan Dean Foster
2005
The Custodians
Dolores Cannon, Ozark Mountain Publishing
1998
The Draco Tavern
Larry Niven
2006
The Edge of reality
J. Allen Hynek
1975