Books about Human-alien encounters -- Fiction (sorted by popularity)
- Survival Type Jesse F. Bone 49 downloads
- Earthmen Ask No Quarter! Fox B. Holden 48 downloads
- Brknk's Bounty Jerry Sohl 48 downloads
- City of the Living Flame Henry Hasse 48 downloads
- Dumbwaiter James Stamers 48 downloads
- Anything You Can Do ... Randall Garrett 48 downloads
- The Vegans Were Curious Winston K. Marks 48 downloads
- Collector's Item Evelyn E. Smith 48 downloads
- Out of Mind William W. Stuart 48 downloads
- The Mercurian Frank Belknap Long 47 downloads
- Perfect Answer Jr. L. J. Stecher 47 downloads
- Revolt in the Ice Empire Ray Cummings 47 downloads
- The Flame Breathers Ray Cummings 47 downloads
- A Matter of Protocol Jack Sharkey 47 downloads
- The Last Monster Gardner F. Fox 47 downloads
- Beast of prey Jay Williams 47 downloads
- Meteor-Men of Mars Harry Cord and Otis Adelbert Kline 47 downloads
- Task Mission Fox B. Holden 47 downloads
- Miss Tweedham's Elogarsn Robert Moore Williams 47 downloads
- Stamped Caution Raymond Z. Gallun 47 downloads
- A Planet for Your Thoughts James Norman 47 downloads
- PRoblem Alan Edward Nourse 47 downloads
- The Sinister Invasion Edmond Hamilton 46 downloads
- The vanguard of Venus Landell Bartlett 46 downloads
- Atavism Erik Fennel 46 downloads