Books about Human-alien encounters -- Fiction (sorted by popularity)
- Restricted Tool Malcolm B. Morehart 60 downloads
- Tourists to Terra Mack Reynolds 60 downloads
- The Thing in the Truck Stephen Marlowe 60 downloads
- Miss Tweedham's Elogarsn Robert Moore Williams 60 downloads
- "Hey Ma, Where's Willie?" I. M. Bukstein 60 downloads
- Blueblood Jim Harmon 60 downloads
- Gods of Space Ray Cummings 60 downloads
- Venus Enslaved Manly Wade Wellman 60 downloads
- Goma's Follicles John De Courcy and Dorothy De Courcy 60 downloads
- The Pacifists Charles E. Fritch 59 downloads
- Unwelcomed Visitor Joseph Samachson 59 downloads
- Vandals of the Void Robert Wilson 59 downloads
- The Next Time We Die Robert Moore Williams 59 downloads
- Crisis on Titan James R. Adams 59 downloads
- World of Mockery Sam Moskowitz 59 downloads
- Feet of Clay Robert Hoskins 59 downloads
- Is That You Xeluchli? Dick Hetschel 59 downloads
- Marty the Martian Arnold Marmor 59 downloads
- Milk Run Robert Donald Locke 58 downloads
- Shock Troop Richard Bolton 58 downloads
- The Time-Techs of Kra Max C. Sheridan 58 downloads
- Redevelopment George O. Smith 58 downloads
- Satellite of Death Randall Garrett 58 downloads
- The Huddlers William Campbell Gault 57 downloads
- Sweet Tooth Robert F. Young 57 downloads