Books about Human-alien encounters -- Fiction (sorted by popularity)
- Trouble on Titan Henry Kuttner 71 downloads
- The Test Colony Winston K. Marks 70 downloads
- Citadel of the Star Lords Edmond Hamilton 70 downloads
- Aide Memoire Keith Laumer 70 downloads
- Retief of the Red-Tape Mountain Keith Laumer 70 downloads
- The Lonely Ones Edward W. Ludwig 70 downloads
- The Pacifists Charles E. Fritch 70 downloads
- My Fair Planet Evelyn E. Smith 70 downloads
- The Girls from Fieu Dayol Robert F. Young 69 downloads
- The Green World Hal Clement 69 downloads
- Bedside Manner Joseph Samachson 69 downloads
- Woman from another planet Frank Belknap Long 68 downloads
- The Great Green Blight Robert Emmett McDowell 68 downloads
- Tiger by the Tail Poul Anderson 68 downloads
- Peacemaker Alan Edward Nourse 68 downloads
- The Double Spy Dan T. Moore 68 downloads
- The Avenger Damon Knight 67 downloads
- Sunfire! Edmond Hamilton 67 downloads
- Terror Out of Space Leigh Brackett 66 downloads
- Fog of the Forgotten Basil Wells 66 downloads
- The Tree of Life C. L. Moore 66 downloads
- The Five Hells of Orion Frederik Pohl 66 downloads
- Mr. Meek Plays Polo Clifford D. Simak 65 downloads
- Accidental Death Peter Baily 65 downloads
- Inside John Barth William W. Stuart 65 downloads