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
Gods Of Aquarius
Brad Steiger
1976
Grey aliens and the harvesting of souls
Nigel Kerner
2010
Halo
Eric S. Nylund
2003
Handbook of UFO religions
Benjamin E. Zeller
2021
Hunter's Run
George R. R. Martin, Gardner R. Dozois, Daniel Abraham
2007
In the Name of Science
Martin Gardner
1952
Inside UFO 54-40
Edward Packard
1982
Inside the Space Ships
George Adamski
1955
Intruders
Budd Hopkins
1987
It Didn't Happen
Sandra Glover
2005
MILABS
Helmut Lammer, Marion Lammer
1999
Majic Eyes Only
Ryan S. Wood
2005
Men in black II
Esther M. Friesner
2002
Messengers of deception
Jacques Vallee
1979
Mindbridge
Joe Haldeman
1976
Missing time
Budd Hopkins
1981
Montauk
Stewart Swerdlow
1998
Morning Glory
Gloria Ann Hawker
2001
Nothing in this book is true, but it's exactly how things are
Bob Frissell
1994
Nothing in this book is true, but that's exactly how things are
Bob Frissell
1994
Passport to Magonia: from folklore to flying saucers
Jacques Vallee, Vallee
1969
Passport to the Cosmos
John E. Mack
1999
Pilgrimage
Zenna Henderson
1961
Quest for truth
Darryl Anka
1997