These are the best science fiction novels ever written, as ranked by the votes and lists of the crowd. Anyone can add their picks to this list of sci-fi books, making it an accurate, real-time ranking of the best in the genre by the people who live and breathe Asimov, Heinlein, Bradbury and Clarke. Vote for the books that you think best represent the greatest science fiction books ever written. If you see a book that's missing, add it. Vote for your faves. And for maximum impact, make your own list, ranked your own way, and add it to the crowd.
http://www.ranker.com/crowdranked-list/the-greatest-science-fiction-novels-of-all-time,
Dune
Nineteen Eighty-Four
The Hitchhiker's Guide to the Galaxy
Ender's Game
Brave New World
Frankenstein
The Time Machine
Foundation
2001: A Space Odyssey
War of the Worlds