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 Humanoids
Aimé Michel, Charles Bowen, Jacques Vallée, Gordon Creighton, Coral Lorenzen, Antonio Ribera
1969
The Social Relations of Physics, Mysticism, and Mathematics
Sal Restivo
1899
The mystery of Atlantis
Charles Berlitz, Ron Halliday
1969
They know us better than we know ourselves
Bridget Ph. D Brown, Bridget Brown
2007
UFO's
Carl Sagan, Thornton Page, Symposium on unidentified flying objects
1972
Unexplained New Zealand ghosts, UFOs & mysterious creatures
Julie Miller, Grant Osborn
2007
Western Esotericism in Scandinavia
Henrik Bogdan, Olav Hammer
2016
Contact with Extraterrestrial Intelligence and Human Law
Michael Bohlander
2023
Behind the flying saucers
Frank Scully
1950
- Read free
Bernard de Fontenelle Dialogen über die Mehrheit der Welten
Bernard Le Bovier de Fontenelle
1789German
- Read free
Bernhard von Fontenelle Dialogen über die Mehrheit der Welten
Bernard Le Bovier de Fontenelle
1780German
- Read free
Considérations nouvelles sur la pluralité des mondes
Charles de Kirwan
1876French
- Read free
Die Zeugung der Himmelskörper, deren Wachsthum, Nahrungsweise, Alter und Todesarten
Joseph Seligmann Kohn
1835German
- Read free
Entdeckung vieler deutlicher Spuren der Mondbewohner
Franz von Paula Gruithuisen
1824German
- Read free
Fontenelle et la Marquise de G. ... dans les mondes
Henri Faure
1821French
- Read free
Gespräche von Mehr als einer Welt zwischen einem Frauen-Zimmer und einem Gelehrten
Bernard Le Bovier de Fontenelle
1698German
- Read free
Gespräche von mehr als einer Welt
Bernard Le Bovier de Fontenelle
1726German
- Read free
Herrn Bernhards von Fontenelle Gespräche von Mehr als einer Welt
Bernard Le Bovier de Fontenelle
1738German
- Read free
Observations philosophiques sur les systêmes de Newton, le mouvement de la terre et la pluralité des mondes
François-Xavier de Feller
1778NOT
- Read free
Oeuvres Diverses De M. De Fontenelle, de l'Academie Françoise. 2, Tome Second Qui contient L'Entretien Sur La Pluralité Des Mondes . L'Histoire Des Oracles
Bernard Le Bovier de Fontenelle
1727French
- Read free
Oeuvres de Fontenelle. 1, Entretiens Sur La Pluralité Des Mondes
Bernard Le Bovier de Fontenelle
1784French
- Read free
Oeuvres diverses de M. de Fontenelle,... Nouvelle édition augmentée.... Dialogues des morts. Jugement de Pluton. Entretiens sur la pluralité des mondes. Histoire des oracles. Oeuvres mêlées
Bernard de Fontenelle
1728French
A common sense approach to UFOs
Betty Hill
1995
Abducted
Ann Andrews, Jean Ritchie
1998