The Time Traveler's Wife by Audrey NiffeneggerOutlander by Diana GabaldonThe Time Machine by H.G. Wells11/22/63 by Stephen  KingA Wrinkle in Time by Madeleine L'Engle
Best Time Travel Fiction
2,156 books — 5,436 voters
The Hunger Games by Suzanne CollinsDivergent by Veronica RothThe Handmaid’s Tale by Margaret AtwoodCinder by Marissa MeyerThe Host by Stephenie Meyer
Best Science Fiction With a Female Protagonist
1,434 books — 3,081 voters

Ender’s Game by Orson Scott CardStarship Troopers by Robert A. HeinleinOld Man's War by John ScalziThe Forever War by Joe HaldemanOn Basilisk Station by David  Weber
Military Science Fiction
850 books — 1,144 voters
Oryx and Crake by Margaret AtwoodThe Windup Girl by Paolo BacigalupiParable of the Sower by Octavia E. ButlerThe Year of the Flood by Margaret AtwoodThe Water Knife by Paolo Bacigalupi
Cli-Fi: Climate Change Fiction
445 books — 659 voters

The Martian by Andy WeirReady Player One by Ernest ClineLeviathan Wakes by James S.A. CoreyAncillary Justice by Ann LeckieRed Rising by Pierce Brown
Science Fiction - 2010-2019
563 books — 757 voters
Old Man's War by John ScalziThe Hunger Games by Suzanne CollinsThe Road by Cormac McCarthyAltered Carbon by Richard K. MorganRevelation Space by Alastair Reynolds
Classic Science Fiction - 2000-2009
332 books — 238 voters