Books about Human-alien encounters -- Fiction (sorted by popularity)
- Colossus of Chaos Nelson S. Bond 107 downloads
- War-Gods of the Void Henry Kuttner 107 downloads
- The Weirdest World R. A. Lafferty 106 downloads
- Learning Theory James V. McConnell 106 downloads
- Der rote Stern: Ein utopischer Roman (German) A. Bogdanov 106 downloads
- An eye for the ladies Stephen Marlowe 105 downloads
- The Blue Behemoth Leigh Brackett 105 downloads
- Corpus earthling Louis Charbonneau 105 downloads
- Child of the Sun Leigh Brackett 104 downloads
- Lord of a Thousand Suns Poul Anderson 104 downloads
- Diplomatic Immunity Robert Sheckley 104 downloads
- The Stranger Gordon R. Dickson 104 downloads
- Doorstep Keith Laumer 103 downloads
- Earth Alert! Kris Neville 103 downloads
- Citadel of the Star Lords Edmond Hamilton 103 downloads
- A Gift from Earth Manly Banister 103 downloads
- Laboratory Jerome Bixby 103 downloads
- Survival Type Jesse F. Bone 102 downloads
- The Madman From Earth Keith Laumer 102 downloads
- The Last Monster Gardner F. Fox 101 downloads
- Les Xipéhuz (French) aîné J.-H. Rosny and jeune J.-H. Rosny 101 downloads
- Action on Azura Robertson Osborne 101 downloads
- The Avenger Damon Knight 101 downloads
- Menace From Vega Randall Garrett and Robert Silverberg 100 downloads
- The Green World Hal Clement 100 downloads