Books about Human-alien encounters -- Fiction (sorted by popularity)
- A world to die for Sam Carson 156 downloads
- Pictures Don't Lie Katherine MacLean 152 downloads
- The Aab Edward W. Ludwig 149 downloads
- Meteor-Men of Mars Harry Cord and Otis Adelbert Kline 146 downloads
- The sky was full of ships Theodore Sturgeon 145 downloads
- The World That Couldn't Be Clifford D. Simak 144 downloads
- The Repairman Harry Harrison 141 downloads
- My Fair Planet Evelyn E. Smith 135 downloads
- A Bad Day for Vermin Keith Laumer 134 downloads
- The expendables A. E. Van Vogt 134 downloads
- If You Was a Moklin Murray Leinster 133 downloads
- The Cosmic Bluff Mack Reynolds 132 downloads
- Battle for the Stars Edmond Hamilton 132 downloads
- Citadel of the Star Lords Edmond Hamilton 131 downloads
- Weapon Jesse F. Bone 130 downloads
- Pogo Planet Donald A. Wollheim 129 downloads
- Triplanetary E. E. Smith 128 downloads
- Communication Charles L. Fontenay 125 downloads
- Angel's Egg Edgar Pangborn 124 downloads
- The Winds of Time James H. Schmitz 124 downloads
- The invading asteroid Manly Wade Wellman 120 downloads
- The Onslaught from Rigel Fletcher Pratt 120 downloads
- The high ones Poul Anderson 119 downloads
- Referent Ray Bradbury 119 downloads
- A Message From Our Sponsor Henry Slesar 118 downloads