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 Galaxy, and the Ground Within
Becky Chambers
2021
3001
Arthur C. Clarke
1997
- Read free
La pluralité des existences de l'âme
André Pezzani
1865French
- Read free
Oeuvres diverses de M. de Fontenelle. T. 1, [2] Entretiens sur la pluralité des mondes
Bernard de Fontenelle
1714French
The Day of the Triffids
John Wyndham, Marcel Battin, Cover by Andy Bridge
1951
The Long Way to a Small, Angry Planet
Becky Chambers
2014
2061
Arthur C. Clarke
1987
Alien discussions
Abduction Study Conference, David Pritchard, Andrea Pritchard
1994
Diary of an Abduction
Angela Thompson Smith
2001
The Threat
David Michael Jacobs
1998
Time Storms
Jenny Randles
2001
The boy who would live forever
Frederik Pohl
2004
This Immortal
Roger Zelazny
1966
To Sleep in a Sea of Stars
Christopher Paolini
2019
Area 51
Nicholas Redfern
2019
- Read free
Discours nouveau prouvant la pluralité des mondes
Pierre Borel
1657French
Lost and Found
Alan Dean Foster
2004
- Read free
Nouvel essai sur la pluralité des mondes au double point de vue scientifique et religieux
Pierre Verdier
1857French
Secret Life
David Michael Jacobs
1992
Childhood’s End
Arthur C. Clarke
1952
Contact
Carl Sagan
1985
The Dark Forest (The Three-Body Problem Series Book 2)
刘慈欣
2008
Communion
Whitley Strieber
1985
The star beast
Robert A. Heinlein
1954