Top 15 Sci-fi Books, According to a Redditor

Someone on Reddit claimed that they have been reading nothing but science fiction for the past 6 years, and made this list as a recommendation:

1. The Sparrow (Mary Doria Russell)
2. Hyperion Series (Dan Simmons)
3. The Stand (Steven King)
4. I, Robot (Isaac Asimov)
5. Dune (Frank Herbert)
6. The Forge of God (Greg Bear)
7. The Forever War (Joe Haldeman)
8. Not Alone (Craig Falconer)
9. The Sirens of Titan (Kurt Vonnegut)
10. Nightfall (Isaac Asimov, Robert Silverberg)
11. Old Man’s War (John Scalzi)
12. Childhood’s End (Arthur C. Clarke)
13. Spin (Robert Charles Wilson)
14. Starship Troopers (Robert Heinlein)
15. Footfall (Larry Niven, Jerry Pournelle)

There is more summary of each book, and honorable mentions, in the Reddit thread.