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
- 914
- Earliest
- 1898
- to 2026
- Read free
- 19%
- 176 with public full text
- With covers
- 60%
How books qualify
- Query + metadata match845
- Metadata match67
- Query match1
- 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
- Fiction319
- Science fiction255
- Extraterrestrial beings242
- Human-alien encounters220
- Unidentified flying objects199
- UFO127
- Alien abduction100
- Short Stories92
- Physical Sciences86
- Social Sciences83
- Astronomy and Astrophysics82
- Physics and Astronomy82
- Space Science and Extraterrestrial Life78
- Children's fiction77
- Fiction, science fiction, general77
- Sightings and encounters77
- Life on other planets73
- Juvenile fiction72
- History68
- Philosophy67
- Psychology67
- Extraterrestrial beings, fiction60
- Social Psychology52
- 未確認飛行物体46
Top languages
- English720 · 79%
- German72 · 8%
- Japanese48 · 5%
- Spanish9 · 1%
- French6 · 1%
Notable authors
All authors- Jacques Vallee14 in this tradition15 books
- Katherine Applegate11 books
- Virgil Finlay8 in this tradition12 books
- Ed Emshwiller7 in this tradition11 books
- Orson Scott Card6 in this tradition8 books
- Pittacus Lore6 in this tradition7 books
- George Adamski6 books
- Marissa Meyer6 books
- Robert A. Heinlein6 books
- 南山, 宏5 in this tradition9 books
- W. E Terry5 in this tradition8 books
- Wallace Wood5 in this tradition6 books
914 books
- Read free
Wilhelm Reich versus the Flying Saucers
James Reich
2024
- Read free
New Lands
Charles Fort, Booth Tarkington
1923
- Read free
Resonance of Unseen Things
Susan Lepselter
2016
- Read free
The Voice Of Venus
Ernest L. Norman
1995
- Read free
The Report on Unidentified Flying Objects
Edward J. Ruppelt
1956
- Read free
The Poet as Experiencer
Adam Staley Groves
2025
- Read free
Paranormal Britain
Christopher D Bader, Joseph O Baker, Tom Clark
2026
After the Flying Saucers Came
Greg Eghigian, Oxford Academic
2024
- Read free
The Flying Saucers Are Real
Donald E. Keyhoe, Robert Pickering, Donald Donald Edward Keyhoe
1950
- Read free
A Dweller on Two Planets
Frederick S. Oliver
1905
- Read free
Deep Cosmopolis
Adam K Webb
2015
- Read free
Escape Philosophy
Roy Christopher
2022
American Cosmic
Diana Walsh Pasulka, EBSCOhost
2019
- Read free
The Unveiled Mysteries
Godfre Ray King
Date unknown
- Read free
The Voice of Eros
Ernest L. Norman
Date unknown
- Read free
The Voice of Hermes
Ernest L. Norman
Date unknown
The handbook of near-death experiences
Bruce Greyson, Debbie James, Janice Miner Holden
2009
- Read free
The Omega File
Branton
Date unknown
- Read free
The Dung Ball Chronicle
Wayne V. Miller
2014
- Read free
Triplanetary
E E Doc Smith, Edward Elmer Smith
1948
Flying saucers from outer space
Donald E. Keyhoe, Donald Keyhoe
1953
- Read free
The Moon Maid
Edgar Rice Burroughs
1926
- Read free
The Moon Men
Edgar Rice Burroughs
1962
- Read free
Witnessed
Budd Hopkins
1996