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
UFOs
Christoph Ernst, Jens Schröter
2025German
A high intermediate cultural reader
M. E. Sokolik
1999
Alien Chic
Neil Badmington
2004
Aliens: Why They Are Here
Bryan Appleyard
2005
Atlas of unidentified flying objects
Andy McGrillen
2025
Beyond Star Trek: From Alien Invasions to the End of Time
Lawrence M. Krauss
1998
Beyond the Gods: Volume I, II, III
Nickolas Patrick Joseph Schoff, Claude Anthropic
2026
Black is beautiful
Peter S. Ruckman
1995
CONSCIENTIOLOGY, SPIRITUALITY AND CONSCIOUSNESS FOR AORTIC BODY AND OTHER PARAGANGLIA CANCER
Edenilson Brandl
2023
Civilizations Beyond Earth
William Sims Bainbridge, Kathryn Coe, Carl L DeVito, Kathryn Denning, Albert A Harrison, Morris Jones, Jason T Kuznicki, Harry Letaw, Craig T Palmer, Alan Penny, George Pettinico, Christina Pomianek, Seth Shostak, Donald E Tarter, Douglas A Vakoch, Paul K Wason
2022
Civilized Life in the Universe
George Basalla
2006
Conspiracy Culture
Peter Knight, P. L. Knight
2013
Conspiracy Culture: From Kennedy to The X Files
Peter Knight
2000
Eight Preposterous Propositions
Robert Ehrlich
2003
Flying saucer occupants
Coral E. Lorenzen
1967
Flying saucers, here and now!
Frank Edwards
1967
Fragments of Forgotten Creations: The Absence of Evidence Is Not Evidence of Absence
HealerRiz
2026
From outer space to you
Howard Menger
1959
Gods or spacemen?
W. Raymond Drake
1964
I visited Ganymede
Yosip Ibrahim
1996
Identified flying objects
Michael Paul Masters
2019
Matrix of Creation: Sacred Geometry in the Realm of the Planets
Richard A. Heath
2004
New Age Millennialism
Phillip Charles Lucas
2011
Out there
Seaerra Miller
2023