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
- 1,014
- Earliest
- 1687
- to 2026
- Read free
- 20%
- 201 with public full text
- With covers
- 56%
How books qualify
- Query + metadata match938
- Metadata match68
- 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
- Fiction319
- Science fiction255
- Extraterrestrial beings242
- Human-alien encounters220
- Unidentified flying objects200
- UFO127
- Alien abduction100
- Short Stories92
- Physical Sciences86
- Social Sciences83
- Astronomy and Astrophysics82
- Physics and Astronomy82
- Life on other planets79
- Space Science and Extraterrestrial Life78
- Children's fiction77
- Fiction, science fiction, general77
- Sightings and encounters77
- Juvenile fiction72
- History68
- Philosophy67
- Psychology67
- Extraterrestrial beings, fiction60
- Social Psychology52
- 未確認飛行物体46
Top languages
- English752 · 74%
- German80 · 8%
- Japanese48 · 5%
- Dutch29 · 3%
- Italian21 · 2%
Notable authors
All authors- Jacques Vallee14 in this tradition15 books
- Katherine Applegate11 books
- Virgil Finlay8 in this tradition12 books
- Bernard Le Bovier de Fontenelle8 in this tradition11 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
- 南山, 宏5 in this tradition9 books
1,014 books
- Read free
Out Around Rigel
Robert H Wilson
Date unknown
- Read free
Peace
Norman Arkawy, Stanley Henig
Date unknown
- Read free
Peacemaker
Alan Edward Nourse, Alex Ebel
Date unknown
- Read free
Pictures Don't Lie
Katherine MacLean, Martin Schneider
Date unknown
- Read free
Planet of Creation
Chester S Geier, Hardison
Date unknown
- Read free
Planet of the Gods
Robert Moore Williams
Date unknown
- Read free
Prelude to Space
Robert W Haseltine, W. E Terry
Date unknown
- Read free
Quest's End
Basil Wells, Joseph Doolin
Date unknown
- Read free
Rabbits Have Long Ears
Lawrence F Willard
Date unknown
- Read free
Return to Earth
Willis Knapp Jones, Margaret Brundage, Virgil Finlay
Date unknown
- Read free
Rough Beast
Roger D Aycock, Barberis
Date unknown
- Read free
Savage Galahad
Bryce Walton, Henry William Kiemle
Date unknown
- Read free
Second Landing
Floyd L. Wallace
Date unknown
- Read free
Shock Troop
Richard Bolton
Date unknown
- Read free
Short Snorter
Charles Einstein, Ed Emshwiller
Date unknown
- Read free
Solar Stiff
Chas. A Stopher
Date unknown
- Read free
Special Delivery
Kris Neville, W. E Terry
Date unknown
- Read free
Specimen
Charles V De Vet, Virgil Finlay
Date unknown
- Read free
Star Surgeon
Alan Edward Nourse
Date unknown
- Read free
Star of Rebirth
Bernard Wall
Date unknown
- Read free
Star-Crossed Lover
William W Stuart, Bob Ritter
Date unknown
- Read free
Success Story
Earl Goodale, Wallace Wood
Date unknown
- Read free
Sweet Tooth
Robert F Young, Norman Nodel
Date unknown
- Read free
Ten From Infinity
Paul W Fairman
Date unknown