Books about Human-alien encounters -- Fiction (sorted by popularity)
- Lord of a Thousand Suns Poul Anderson 75 downloads
- Madmen of Mars Erik Fennel 75 downloads
- Once a Greech Evelyn E. Smith 75 downloads
- The leaf Robert F. Young 74 downloads
- The Test Colony Winston K. Marks 74 downloads
- Green Grew the Lasses Ruth Laura Wainwright 74 downloads
- Meteor-Men of Mars Harry Cord and Otis Adelbert Kline 74 downloads
- The guest rites Robert Silverberg 74 downloads
- The Sinister Invasion Edmond Hamilton 74 downloads
- The Last Martian Ray Van Houten 74 downloads
- City of the Living Flame Henry Hasse 74 downloads
- Laboratory Jerome Bixby 74 downloads
- Avoidance Situation James V. McConnell 74 downloads
- Vandals of the Void Robert Wilson 74 downloads
- Dumbwaiter James Stamers 73 downloads
- Contamination Crew Alan Edward Nourse 73 downloads
- Redevelopment George O. Smith 73 downloads
- Big Baby Jack Sharkey 73 downloads
- The Native Soil Alan Edward Nourse 73 downloads
- All That Earthly Remains C. C. MacApp 73 downloads
- Brknk's Bounty Jerry Sohl 73 downloads
- Crisis on Titan James R. Adams 73 downloads
- The Barbarians Tom Godwin 73 downloads
- The Martians and the Coys Mack Reynolds 72 downloads
- The Vegans Were Curious Winston K. Marks 72 downloads