Books about Human-alien encounters -- Fiction (sorted by popularity)
- A world to die for Sam Carson 122 downloads
- The Winds of Time James H. Schmitz 122 downloads
- And Then the Town Took Off Richard Wilson 120 downloads
- Pen Pal Stephen Marlowe 120 downloads
- The Stranger Gordon R. Dickson 119 downloads
- Trouble on Tycho Nelson S. Bond 119 downloads
- Cinderella Story Allen Kim Lang 119 downloads
- A Matter of Protocol Jack Sharkey 119 downloads
- The Snowbank Orbit Fritz Leiber 118 downloads
- The Blue Behemoth Leigh Brackett 116 downloads
- Operation Terror Murray Leinster 116 downloads
- Harwood's Vortex Robert Silverberg 115 downloads
- Angel's Egg Edgar Pangborn 115 downloads
- Tiger by the Tail Poul Anderson 115 downloads
- Once a Greech Evelyn E. Smith 115 downloads
- The Star Beast Damon Knight 114 downloads
- Lord of a Thousand Suns Poul Anderson 114 downloads
- Accidental Death Peter Baily 114 downloads
- The Jameson Satellite Neil R. Jones 114 downloads
- Weapon Jesse F. Bone 113 downloads
- Citadel of the Star Lords Edmond Hamilton 113 downloads
- Meeting of the Minds Robert Sheckley 113 downloads
- The Onslaught from Rigel Fletcher Pratt 113 downloads
- Doorstep Keith Laumer 113 downloads
- Der rote Stern: Ein utopischer Roman (German) A. Bogdanov 112 downloads