Books about Life on other planets -- Fiction (sorted by popularity)
- Prodigal Weapon Bill Garson 50 downloads
- The missionary Jesse F. Bone 49 downloads
- The Autumn After Next Margaret St. Clair 49 downloads
- The overlord's thumb Robert Silverberg 49 downloads
- Out of Mind William W. Stuart 48 downloads
- Spacerogue Robert Silverberg 48 downloads
- Temptress of Planet Delight Betsy Curtis 47 downloads
- Beast of prey Jay Williams 47 downloads
- A Planet for Your Thoughts James Norman 47 downloads
- A Matter of Protocol Jack Sharkey 47 downloads
- Sword of the Seven Suns Gardner F. Fox 46 downloads
- Space Blackout Sam Carson 46 downloads
- Between the dark and the daylight Algis Budrys 46 downloads
- The Chemically Pure Warriors Allen Kim Lang 45 downloads
- Slave Planet Laurence M. Janifer 45 downloads
- The Ethic of the Assassin Hayden Howard 45 downloads
- Thralls of the Endless Night Leigh Brackett 44 downloads
- Among the Scented Ones Basil Wells 44 downloads
- Star of Rebirth Bernard Wall 44 downloads
- The Earth Quarter Damon Knight 43 downloads
- The right side of the tracks Albert Teichner 43 downloads
- The night of no moon H. B. Fyfe 43 downloads
- Operation Interstellar George O. Smith 43 downloads
- Against Tetrarch A. A. O. Gilmour 43 downloads
- The Bloodhounds of Zirth Lloyd Palmer 43 downloads