Books about Human-alien encounters -- Fiction (sorted by popularity)
- The Onslaught from Rigel Fletcher Pratt 134 downloads
- What's He Doing in There? Fritz Leiber 133 downloads
- Angel's Egg Edgar Pangborn 133 downloads
- Proxy Planeteers Edmond Hamilton 133 downloads
- We're Civilized! Mark Clifton and Alex Apostolides 133 downloads
- Boarding party Robert F. Young 133 downloads
- Left hand, right hand James H. Schmitz 131 downloads
- Hellflower George O. Smith 131 downloads
- Asteroid of the Damned Frederik Pohl and Dirk Wylie 131 downloads
- Der rote Stern: Ein utopischer Roman (German) A. Bogdanov 130 downloads
- The untouchable adolescents Harlan Ellison 130 downloads
- An eye for the ladies Stephen Marlowe 129 downloads
- The Galactic Ghost Mack Reynolds 129 downloads
- Little men of space Frank Belknap Long 128 downloads
- Jackie sees a star Marion Zimmer Bradley 128 downloads
- The Five Hells of Orion Frederik Pohl 127 downloads
- Peril of the Blue World Robert Abernathy 126 downloads
- A Zloor for Your Trouble! Mack Reynolds 126 downloads
- Needler Randall Garrett 126 downloads
- A Bad Day for Vermin Keith Laumer 125 downloads
- Citadel of the Star Lords Edmond Hamilton 125 downloads
- Diplomatic Immunity Robert Sheckley 125 downloads
- Rhythm rides the rocket Bob Olsen 124 downloads
- The Venus Trap Evelyn E. Smith 124 downloads
- The Repairman Harry Harrison 124 downloads