Books about Human-alien encounters -- Fiction (sorted by popularity)
- Proxy Planeteers Edmond Hamilton 145 downloads
- Boarding party Robert F. Young 144 downloads
- Rough Beast Roger D. Aycock 143 downloads
- An eye for the ladies Stephen Marlowe 142 downloads
- Doorstep Keith Laumer 142 downloads
- Prodigal Weapon Bill Garson 141 downloads
- The Venus Trap Evelyn E. Smith 140 downloads
- What's He Doing in There? Fritz Leiber 140 downloads
- Battle for the Stars Edmond Hamilton 140 downloads
- 30-day wonder Richard Wilson 140 downloads
- Asteroid of the Damned Frederik Pohl and Dirk Wylie 139 downloads
- Honeymoon in bedlam Nelson S. Bond 139 downloads
- The Five Hells of Orion Frederik Pohl 138 downloads
- Diplomatic Immunity Robert Sheckley 137 downloads
- Jackie sees a star Marion Zimmer Bradley 137 downloads
- The Green World Hal Clement 136 downloads
- The passionate pitchman Stephen Marlowe 135 downloads
- The thought-feeders R. R. Winterbotham 135 downloads
- A Bad Day for Vermin Keith Laumer 135 downloads
- The Madcap Metalloids Verne Athanas 134 downloads
- Retief of the Red-Tape Mountain Keith Laumer 133 downloads
- Car Pool Rosel George Brown 133 downloads
- End as a Hero Keith Laumer 133 downloads
- A Transmutation of Muddles H. B. Fyfe 133 downloads
- Left hand, right hand James H. Schmitz 132 downloads