Books about Human-alien encounters -- Fiction (sorted by popularity)
- Triplanetary E. E. Smith 111 downloads
- Peace Norman Arkawy and Stanley Henig 109 downloads
- The Winds of Time James H. Schmitz 107 downloads
- The Venus Trap Evelyn E. Smith 105 downloads
- The prince of space Jack Williamson 101 downloads
- Naudsonce H. Beam Piper 100 downloads
- Colossus of Chaos Nelson S. Bond 96 downloads
- If You Was a Moklin Murray Leinster 95 downloads
- Lumen Camille Flammarion 94 downloads
- Pen Pal Stephen Marlowe 93 downloads
- Beyond Light Nelson S. Bond 92 downloads
- Helpfully Yours Evelyn E. Smith 91 downloads
- The Repairman Harry Harrison 91 downloads
- The World That Couldn't Be Clifford D. Simak 90 downloads
- Mightiest Qorn Keith Laumer 88 downloads
- And we sailed the mighty dark Frank Belknap Long 87 downloads
- The expendables A. E. Van Vogt 85 downloads
- The untouchable adolescents Harlan Ellison 85 downloads
- Meeting of the Minds Robert Sheckley 84 downloads
- Weapon Jesse F. Bone 83 downloads
- Clean Break Roger D. Aycock 83 downloads
- Nobody saw the ship Murray Leinster 82 downloads
- Escape Mechanism Charles E. Fritch 81 downloads
- The Madman From Earth Keith Laumer 81 downloads
- 30-day wonder Richard Wilson 81 downloads