Books about Human-alien encounters -- Fiction (sorted by popularity)
- "Shadrach" Nelson S. Bond 116 downloads
- Jackie sees a star Marion Zimmer Bradley 115 downloads
- Advance Agent Christopher Anvil 115 downloads
- Operation Terror Murray Leinster 114 downloads
- Lord of a Thousand Suns Poul Anderson 114 downloads
- Pen Pal Stephen Marlowe 114 downloads
- The Vegans Were Curious Winston K. Marks 113 downloads
- The Tree of Life C. L. Moore 113 downloads
- Survival Type Jesse F. Bone 112 downloads
- Strange Exodus Robert Abernathy 112 downloads
- Cry from a Far Planet Tom Godwin 111 downloads
- Laboratory Jerome Bixby 111 downloads
- The mystery of Deneb IV Robert Silverberg 111 downloads
- No Sons Left to Die! Hal Annas 110 downloads
- The Stranger Gordon R. Dickson 110 downloads
- Spacemen lost George O. Smith 110 downloads
- An eye for the ladies Stephen Marlowe 109 downloads
- Der rote Stern: Ein utopischer Roman (German) A. Bogdanov 109 downloads
- Mightiest Qorn Keith Laumer 109 downloads
- Citadel of the Star Lords Edmond Hamilton 109 downloads
- The God-Plllnk Jerome Bixby 109 downloads
- Student Body F. L. Wallace 108 downloads
- The invading asteroid Manly Wade Wellman 107 downloads
- If You Was a Moklin Murray Leinster 107 downloads
- Mo-Sanshon! Bryce Walton 107 downloads