Books about Human-alien encounters -- Fiction (sorted by popularity)
- The World That Couldn't Be Clifford D. Simak 172 downloads
- Meeting of the Minds Robert Sheckley 169 downloads
- The expendables A. E. Van Vogt 168 downloads
- The prince of space Jack Williamson 163 downloads
- Naudsonce H. Beam Piper 160 downloads
- Learning Theory James V. McConnell 158 downloads
- Nobody saw the ship Murray Leinster 156 downloads
- When the atoms failed Jr. John W. Campbell 153 downloads
- Beyond our control Randall Garrett 151 downloads
- Amour, Amour, Dear Planet! Mark Clutter 150 downloads
- The high ones Poul Anderson 149 downloads
- White spot Murray Leinster 149 downloads
- The Sentimentalists Murray Leinster 149 downloads
- The Jameson Satellite Neil R. Jones 148 downloads
- Honeymoon in bedlam Nelson S. Bond 147 downloads
- Terror Out of Space Leigh Brackett 147 downloads
- Jackie sees a star Marion Zimmer Bradley 147 downloads
- The Madman From Earth Keith Laumer 146 downloads
- Mightiest Qorn Keith Laumer 145 downloads
- Strange Exodus Robert Abernathy 145 downloads
- Anything You Can Do ... Randall Garrett 144 downloads
- The Winds of Time James H. Schmitz 144 downloads
- Biddy and the silver man Harlan Ellison 144 downloads
- Woman's touch Evelyn E. Smith 143 downloads
- Pattern Robert H. Rohrer 142 downloads