Books about Human-alien encounters -- Fiction (sorted by popularity)
- Membership Drive Murray F. Yaco 85 downloads
- The Hero Elaine Wilber 85 downloads
- The way out Richard Rein Smith 85 downloads
- Savage Galahad Bryce Walton 84 downloads
- Always a Qurono Jim Harmon 84 downloads
- The high ones Poul Anderson 84 downloads
- The Sweeper of Loray Robert Sheckley 83 downloads
- Les Xipéhuz (French) aîné J.-H. Rosny and jeune J.-H. Rosny 83 downloads
- The Blue Behemoth Leigh Brackett 83 downloads
- A Gift For Terra Fox B. Holden 83 downloads
- Citadel of the Star Lords Edmond Hamilton 83 downloads
- The Little Monsters Come Ray Cummings 83 downloads
- Problem on Balak Roger D. Aycock 83 downloads
- The Plotters Richard S. Shaver 82 downloads
- A Transmutation of Muddles H. B. Fyfe 82 downloads
- A time to die Harold Calin 82 downloads
- The Planet That Time Forgot Donald A. Wollheim 82 downloads
- Retief of the Red-Tape Mountain Keith Laumer 82 downloads
- Der rote Stern: Ein utopischer Roman (German) A. Bogdanov 82 downloads
- Manners and Customs of the Thrid Murray Leinster 82 downloads
- The Gravity Business James E. Gunn 82 downloads
- Juggernaut of Space Ray Cummings 82 downloads
- Cargo to Callisto Jerome Bixby 82 downloads
- Bedside Manner Joseph Samachson 82 downloads
- Peace Norman Arkawy and Stanley Henig 81 downloads