Unidentified flying objects
Featured — award winners and classics first, when available. Use “Show different books” for a new selection.
🔄 Show different books
Beyond science fiction
Abducted!
The Andreasson affair
In the Ocean of Night
The solid truth about states of matter with Max Axiom super scientist
Intruders
Arthur and the Comet Crisis
Witnessed
Spooksville - Aliens in the Sky
Other dimensions
Unidentified
Alien Abductions
The Hollow Earth
Project disclosure
A world of UFOs
The Book of the Damned / Lo! / Wild Talents / New Lands
The coming of Tan
UFO crash at Roswell
Gravitational manipulation of domed craft
Glimpses of Other Realities
The Hynek UFO report
UFO chronicles of the Soviet Union
UFO secrets revealed
The secret of the flying saucer
Spaceships of the Pleiades
The Andreasson affair, phase two
The 37th parallel
Nothing in this book is true, but that's exactly how things are
Revelations
Unexplained!
Browse free books to read online
Book Explorer lets readers browse the free, readable part of the Open Library catalogue by familiar genres, or by the exact subject tags Open Library assigns each book. Every book has its own page with a reader where one is available, plus links to Open Library, your library, Libby and Amazon.
Fiction
- All Fiction
- Literary Fiction
- Children's Fiction
- Mystery & Detective
- Romance
- Fantasy
- Thriller & Suspense
- Historical Fiction
- Science Fiction
- Graphic Novels & Comics
- Humor
- Short Stories
- Horror
- Young Adult Fiction
- Western
Non-fiction
- All Non-fiction
- History
- Biography & Memoir
- Religion & Spirituality
- Politics & Social Sciences
- Travel
- Philosophy
- Business & Economics
- Science
- Art & Photography
- Cooking
- Self-Help
- Music
- Health & Fitness
- Sports & Recreation
- Humor
- True Crime