Books about Human-alien encounters -- Fiction (sorted by popularity)
- Woman from another planet Frank Belknap Long 125 downloads
- Come Into My Brain! Robert Silverberg 124 downloads
- Doorstep Keith Laumer 123 downloads
- Reign of the telepuppets Daniel F. Galouye 123 downloads
- We're Civilized! Mark Clifton and Alex Apostolides 122 downloads
- Proxy Planeteers Edmond Hamilton 121 downloads
- Weapon Jesse F. Bone 121 downloads
- The Star Beast Damon Knight 120 downloads
- Harwood's Vortex Robert Silverberg 119 downloads
- The Onslaught from Rigel Fletcher Pratt 119 downloads
- Menace From Vega Randall Garrett and Robert Silverberg 118 downloads
- If You Was a Moklin Murray Leinster 118 downloads
- The Lunarian Professor and His Remarkable Revelations Concerning the Earth, the Moon and Mars James B. Alexander 118 downloads
- The Cosmic Bluff Mack Reynolds 117 downloads
- Lair of the Dragonbird Robert Silverberg 117 downloads
- The overlord's thumb Robert Silverberg 116 downloads
- Lumen Camille Flammarion 116 downloads
- The Venus Trap Evelyn E. Smith 115 downloads
- The invading asteroid Manly Wade Wellman 115 downloads
- And Then the Town Took Off Richard Wilson 115 downloads
- Nobody saw the ship Murray Leinster 115 downloads
- The Tree of Life C. L. Moore 115 downloads
- Sunfire! Edmond Hamilton 114 downloads
- Der rote Stern: Ein utopischer Roman (German) A. Bogdanov 114 downloads
- Task of Kayin Joseph Samachson 114 downloads