Books about Human-alien encounters -- Fiction (sorted by popularity)
- The miniature menace Frank Belknap Long 35 downloads
- Big Stupe Charles V. De Vet 35 downloads
- The Best of Fences Randall Garrett 35 downloads
- Vocation George O. Smith 35 downloads
- Sidewinders From Sirius Fox B. Holden 35 downloads
- The Unprotected Species Melvin Sturgis 35 downloads
- Leave, Earthmen—Or Die! John Massie Davis 35 downloads
- Oh Mesmerist From Mimas! Roger D. Aycock 35 downloads
- Jimsy and the Monsters Walter J. Sheldon 34 downloads
- The Unwilling Professor Arthur Porges 34 downloads
- The Hand Jerry Sohl 34 downloads
- Marty the Martian Arnold Marmor 34 downloads
- Men Without a World Joseph Farrell 34 downloads
- The Hitch Hikers Vernon L. McCain 34 downloads
- Invader From Infinity George A. Whittington 34 downloads
- Peril of the Starmen Kris Neville 34 downloads
- The Galactic Ghost Mack Reynolds 34 downloads
- Cosmic Tragedy Thomas S. Gardiner 34 downloads
- Get Out of My Body! Tom W. Harris 34 downloads
- Mo-Sanshon! Bryce Walton 34 downloads
- Goma's Follicles John De Courcy and Dorothy De Courcy 34 downloads
- I'll See You in My Dreams William Campbell Gault 33 downloads
- Harwood's Vortex Robert Silverberg 33 downloads
- Meeting at the Summit Ivar Jorgensen 33 downloads
- Secret of the Martians Paul W. Fairman 33 downloads