Books about Human-alien encounters -- Fiction (sorted by popularity)
- My Fair Planet Evelyn E. Smith 177 downloads
- Triplanetary E. E. Smith 168 downloads
- The Aab Edward W. Ludwig 164 downloads
- A Bad Day for Vermin Keith Laumer 160 downloads
- Crisis! C. M. Kornbluth 156 downloads
- The Repairman Harry Harrison 155 downloads
- The World That Couldn't Be Clifford D. Simak 149 downloads
- The sky was full of ships Theodore Sturgeon 149 downloads
- The expendables A. E. Van Vogt 147 downloads
- The Winds of Time James H. Schmitz 145 downloads
- A Message From Our Sponsor Henry Slesar 144 downloads
- The Lunarian Professor and His Remarkable Revelations Concerning the Earth, the Moon and Mars James B. Alexander 143 downloads
- Pen Pal Stephen Marlowe 142 downloads
- Student Body F. L. Wallace 142 downloads
- Citadel of the Star Lords Edmond Hamilton 137 downloads
- Once a Greech Evelyn E. Smith 137 downloads
- Lumen Camille Flammarion 134 downloads
- The Vanishing Venusians Leigh Brackett 133 downloads
- Pogo Planet Donald A. Wollheim 132 downloads
- Angel's Egg Edgar Pangborn 132 downloads
- Spacemen lost George O. Smith 131 downloads
- Beyond our control Randall Garrett 131 downloads
- Come Into My Brain! Robert Silverberg 130 downloads
- If You Was a Moklin Murray Leinster 130 downloads
- Planet of the Gods Robert Moore Williams 129 downloads