Books about Human-alien encounters -- Fiction (sorted by popularity)
- The Little Pets of Arkkhan Bill Garson 48 downloads
- The Unprotected Species Melvin Sturgis 48 downloads
- When Whirlybirds Call Frank Banta 48 downloads
- No Sons Left to Die! Hal Annas 48 downloads
- Peace Norman Arkawy and Stanley Henig 48 downloads
- Miss Tweedham's Elogarsn Robert Moore Williams 48 downloads
- Jupiter's Joke A. L. Haley 47 downloads
- The Victory of Klon Wilbur S. Peacock 47 downloads
- It Hayden Howard 47 downloads
- Prelude to Space Robert W. Haseltine 47 downloads
- Menace of the Mists H. L. Gold 47 downloads
- The Revolt of the Star Men Raymond Z. Gallun 47 downloads
- Planet of No-Return Wilbur S. Peacock 46 downloads
- Under the Skin Leslie Perri 46 downloads
- Goma's Follicles John De Courcy and Dorothy De Courcy 45 downloads
- Cosmic Saboteur Frank M. Robinson 45 downloads
- Milk Run Robert Donald Locke 44 downloads
- Lorelei Charles V. De Vet 44 downloads
- The Venus Evil Chester S. Geier 44 downloads
- The Polite People of Pudibundia R. A. Lafferty 43 downloads
- Gunnison's Bonanza Dick Purcell 43 downloads
- Open Invitation H. B. Fyfe 42 downloads
- Brknk's Bounty Jerry Sohl 42 downloads
- Grounded William Sambrot 42 downloads
- The Purple Pariah Byron Tustin 41 downloads