Books about Human-alien encounters -- Fiction (sorted by popularity)
- My Fair Planet Evelyn E. Smith 71 downloads
- Diplomatic Immunity Robert Sheckley 70 downloads
- Woman from another planet Frank Belknap Long 70 downloads
- The Double Spy Dan T. Moore 70 downloads
- Tiger by the Tail Poul Anderson 70 downloads
- Bedside Manner Joseph Samachson 70 downloads
- Retief of the Red-Tape Mountain Keith Laumer 69 downloads
- Citadel of the Star Lords Edmond Hamilton 69 downloads
- The Green World Hal Clement 69 downloads
- Venus Enslaved Manly Wade Wellman 68 downloads
- Peacemaker Alan Edward Nourse 68 downloads
- All That Earthly Remains C. C. MacApp 67 downloads
- The Lonely Ones Edward W. Ludwig 67 downloads
- Der rote Stern: Ein utopischer Roman (German) A. Bogdanov 66 downloads
- Inside John Barth William W. Stuart 66 downloads
- The Girls from Fieu Dayol Robert F. Young 66 downloads
- The Contact Point Jack Sharkey 66 downloads
- The Tree of Life C. L. Moore 66 downloads
- Return Engagement Margaret St. Clair 65 downloads
- The Blue Behemoth Leigh Brackett 65 downloads
- The Great Green Blight Robert Emmett McDowell 65 downloads
- Asteroid of the Damned Frederik Pohl and Dirk Wylie 65 downloads
- Aide Memoire Keith Laumer 65 downloads
- Terror Out of Space Leigh Brackett 65 downloads
- Doorstep Keith Laumer 64 downloads