Books about Human-alien encounters -- Fiction (sorted by popularity)
- Daughter Philip José Farmer 88 downloads
- Planet of Doom Stephen Marlowe 88 downloads
- Woman from another planet Frank Belknap Long 88 downloads
- Men Without a World Joseph Farrell 88 downloads
- The Galactic Ghost Mack Reynolds 88 downloads
- The Vilbar Party Evelyn E. Smith 87 downloads
- The Gravity Business James E. Gunn 87 downloads
- All That Earthly Remains C. C. MacApp 87 downloads
- The Planet That Time Forgot Donald A. Wollheim 86 downloads
- Proxy Planeteers Edmond Hamilton 86 downloads
- The Anglers of Arz Roger D. Aycock 86 downloads
- Regulations Murray Leinster 86 downloads
- Retief of the Red-Tape Mountain Keith Laumer 86 downloads
- A time to die Harold Calin 86 downloads
- Satisfaction Guaranteed Joy Leache 86 downloads
- Strange Exodus Robert Abernathy 85 downloads
- The ghost planet Murray Leinster 85 downloads
- Task of Kayin Joseph Samachson 85 downloads
- Earthmen Ask No Quarter! Fox B. Holden 85 downloads
- Special Delivery Kris Neville 85 downloads
- Master Race Richard Ashby 85 downloads
- Rhythm rides the rocket Bob Olsen 85 downloads
- Hellflower George O. Smith 84 downloads
- Secret of the Martians Paul W. Fairman 84 downloads
- The Monster That Threatened the Universe R. R. Winterbotham 84 downloads