Books about Human-alien encounters -- Fiction (sorted by popularity)
- Meteor-Men of Mars Harry Cord and Otis Adelbert Kline 169 downloads
- Woman's touch Evelyn E. Smith 163 downloads
- Communication Charles L. Fontenay 162 downloads
- Triplanetary E. E. Smith 159 downloads
- Student Body F. L. Wallace 155 downloads
- If You Was a Moklin Murray Leinster 153 downloads
- Beyond Light Nelson S. Bond 153 downloads
- Pictures Don't Lie Katherine MacLean 148 downloads
- 30-day wonder Richard Wilson 147 downloads
- The expendables A. E. Van Vogt 144 downloads
- The Aab Edward W. Ludwig 139 downloads
- We're Civilized! Mark Clifton and Alex Apostolides 138 downloads
- Crisis! C. M. Kornbluth 136 downloads
- Referent Ray Bradbury 133 downloads
- Naudsonce H. Beam Piper 132 downloads
- Attitude Hal Clement 130 downloads
- The Sentimentalists Murray Leinster 129 downloads
- The World That Couldn't Be Clifford D. Simak 129 downloads
- A world to die for Sam Carson 127 downloads
- "Shadrach" Nelson S. Bond 127 downloads
- The high ones Poul Anderson 127 downloads
- Nobody saw the ship Murray Leinster 126 downloads
- Anything You Can Do ... Randall Garrett 126 downloads
- The Repairman Harry Harrison 125 downloads
- The Stranger Gordon R. Dickson 124 downloads