Tradition 20 of 35
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
- 1,111
- Earliest
- 1558
- to 2026
- Read free
- 26%
- 292 with public full text
- With covers
- 55%
How books qualify
- Query + metadata match1,034
- 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
- Fiction363
- Science fiction258
- Extraterrestrial beings257
- Human-alien encounters253
- Unidentified flying objects216
- UFO128
- Alien abduction101
- Short Stories92
- Life on other planets90
- Physical Sciences86
- Sightings and encounters84
- Social Sciences83
- Astronomy and Astrophysics82
- Physics and Astronomy82
- Children's fiction80
- Space Science and Extraterrestrial Life78
- Fiction, science fiction, general77
- Juvenile fiction75
- History69
- Philosophy68
- psychology68
- Extraterrestrial beings, fiction62
- Social Psychology52
- 未確認飛行物体46
Top languages
- English771 · 69%
- German86 · 8%
- Japanese48 · 4%
- French31 · 3%
- Dutch29 · 3%
Notable authors
All authors- Jacques Vallee14 in this tradition15 books
- John Ringo13 books
- Katherine Applegate12 in this tradition14 books
- M. de Fontenelle11 in this tradition12 books
- Bernard Le Bovier de Fontenelle9 in this tradition15 books
- Virgil Finlay8 in this tradition18 books
- Ed Emshwiller7 in this tradition12 books
- George Adamski7 books
- Orson Scott Card6 in this tradition8 books
- Pittacus Lore6 in this tradition7 books
- Robert A. Heinlein6 in this tradition7 books
- Donald E. Keyhoe6 books
1,111 books
- Read free
Wilhelm Reich versus the Flying Saucers
James Reich
2024
- Read free
New Lands
Charles Fort, Booth Tarkington
1923
- Read free
The Report on Unidentified Flying Objects
Edward J. Ruppelt
1956
- Read free
Resonance of Unseen Things
Susan Lepselter
2016
- Read free
The Voice Of Venus
Ernest L. Norman
1995
- Read free
The Poet as Experiencer
Adam Staley Groves
2025
- Read free
The Flying Saucers Are Real
Donald E. Keyhoe, Robert Pickering, Donald Donald Edward Keyhoe
1950
- 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
Plan of the creation; or, Other worlds, and who inhabit them
Charles Louis Hequembourg
1858
- Read free
The Vanguard of Venus
Landell Barlett
1928
- Read free
Triplanetary
E E Doc Smith, Edward Elmer Smith
1934
- 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
- Read free
The mathematical and philosophical works of the Right Rev. John Wilkins, late lord bishop of Chester
George Fabyan Collection DLC, John Wilkins
1802
- Read free
[Laurens (Bark) of Sag Harbor, NY, mastered by Atkins Eldridge, keeper Samuel S. Stafford, on voyage 21 August 1845 - January 1848]
Laurens
1845
- Read free
[Roman (Ship) of New Bedford, Mass., mastered by Robert M. Joy, keeper Robert M. Joy, on voyage 28 November 1835 - 7 April 1839]
Roman
1835
- Read free
Entretiens sur la pluralité des mondes
Bernard Le Bovier de Fontenelle, M. de Fontenelle, Bernard de Fontenelle
1686French
- Read free
The mathematical and philosophical works of the Right Reverend John Wilkins ... To which is prefix'd the author's life, and an account of his works
John Wilkins
1708
- Read free
The mathematical and philosophical works of the Right Reverend John Wilkins ... to which is prefix'd the author's life, and an account of his works
George Fabyan Collection, Pre-1801 Imprint Collection, John Wilkins
1708
- Read free
La pluralité des mondes habités
Camille Flammarion
1862French
- Read free
Planet of the Damned
Harry Harrison
1900
- Read free
Herrn Bernhards von Fontenelle Auserlesene Schriften
Bernard Le Bovier de Fontenelle, M. de Fontenelle
1760German