Books about Human-alien encounters -- Fiction (sorted by popularity)
- Export Commodity Irving E. Cox 69 downloads
- Earthmen Ask No Quarter! Fox B. Holden 69 downloads
- The Planet That Time Forgot Donald A. Wollheim 69 downloads
- The Weather on Mercury Joseph Samachson 69 downloads
- The Grave of Solon Regh Charles A. Stearns 68 downloads
- The Victory of Klon Wilbur S. Peacock 68 downloads
- Juggernaut of Space Ray Cummings 68 downloads
- Green Grew the Lasses Ruth Laura Wainwright 68 downloads
- Girl of the Silver Sphere J. Harvey Haggard 68 downloads
- The Gift Bearer Charles L. Fontenay 68 downloads
- Leave, Earthmen—Or Die! John Massie Davis 68 downloads
- Es Percipi Stephen Marlowe 68 downloads
- Dawningsburgh Wallace West 68 downloads
- Boy meets dyevitza Robert F. Young 67 downloads
- The Anglers of Arz Roger D. Aycock 67 downloads
- Proktols of Neptune Henry Hasse 67 downloads
- The Mercurian Frank Belknap Long 67 downloads
- Home is the Spaceman George O. Smith 67 downloads
- The Snowbank Orbit Fritz Leiber 67 downloads
- Lair of the Dragonbird Robert Silverberg 67 downloads
- Never Trust a Thief! Robert Silverberg 67 downloads
- The Last Laugh Bryce Walton 66 downloads
- Not Fit for Children Evelyn E. Smith 66 downloads
- Open Invitation H. B. Fyfe 66 downloads
- A Gift For Terra Fox B. Holden 66 downloads