Books about Human-alien encounters -- Fiction (sorted by popularity)
- Cinderella Story Allen Kim Lang 72 downloads
- Aide Memoire Keith Laumer 72 downloads
- The high ones Poul Anderson 71 downloads
- The Planet That Time Forgot Donald A. Wollheim 70 downloads
- Cry from a Far Planet Tom Godwin 70 downloads
- And we sailed the mighty dark Frank Belknap Long 70 downloads
- Der rote Stern: Ein utopischer Roman (German) A. Bogdanov 70 downloads
- Learning Theory James V. McConnell 70 downloads
- Boy meets dyevitza Robert F. Young 69 downloads
- Inside John Barth William W. Stuart 69 downloads
- The Vibration Wasps Frank Belknap Long 68 downloads
- A Gift from Earth Manly Banister 68 downloads
- The Catspaw George O. Smith 68 downloads
- The Revolt of the Star Men Raymond Z. Gallun 68 downloads
- The Tree of Life C. L. Moore 68 downloads
- Spawning Ground Lester Del Rey 67 downloads
- A Bad Day for Vermin Keith Laumer 67 downloads
- The Girls from Fieu Dayol Robert F. Young 67 downloads
- 30-day wonder Richard Wilson 67 downloads
- The Blue Behemoth Leigh Brackett 67 downloads
- The guest rites Robert Silverberg 67 downloads
- Communication Charles L. Fontenay 67 downloads
- Les Xipéhuz (French) aîné J.-H. Rosny and jeune J.-H. Rosny 67 downloads
- Membership Drive Murray F. Yaco 67 downloads
- Proxy Planeteers Edmond Hamilton 66 downloads