The Three-Body Problem by Liu Cixin
Most Under-rated Science Fiction
2,088 books — 2,199 voters
The Hitchhiker's Guide To The Galaxy by Douglas AdamsRendezvous with Rama by Arthur C. ClarkeThe City and the Stars by Arthur C. ClarkeChildhood's End by Arthur C. ClarkeThe Gods Themselves by Isaac Asimov
SF Masterworks
203 books — 723 voters

The Complete Cosmicomics by Italo CalvinoThe Hitchhiker’s Guide to the Galaxy by Douglas AdamsFlatland by Edwin A. Abbott2001 by Arthur C. ClarkeChildhood’s End by Arthur C. Clarke
Atheism & Popular Science
107 books — 47 voters
The Sparrow by Mary Doria Russell
Spiritual Sci-Fi
31 books — 59 voters

Rendezvous with Rama by Arthur C. ClarkeChildhood’s End by Arthur C. ClarkeContact by Carl SaganThe Three-Body Problem by Liu Cixin2001 by Arthur C. Clarke
First Contact
280 books — 389 voters