Vigilant by James Alan Gardner
Nonbinary Societies in SFF
134 books — 23 voters
7th Sigma by Steven GouldEmergency Skin by N.K. JemisinThe Skinner by Neal Asher
Biotech Science Fiction
30 books — 8 voters

The Tar-Aiym Krang by Alan Dean FosterNor Crystal Tears by Alan Dean FosterAcorna by Anne McCaffreyA Beautiful Friendship by David  WeberYoung Miles by Lois McMaster Bujold
Teenagers . . . IN SPACE!
472 books — 731 voters
To Hold the Bridge by Garth Nix
Best Young Adult Books
13,152 books — 80,225 voters

The Sisters of Saint Nicola of The Almost Perpetual Motion vs... by Garth Nix
Best Steampunk Books
1,253 books — 4,095 voters

Footfall by Larry NivenProtector by Larry NivenAcorna by Anne McCaffreyThe Cluster Series by Piers AnthonyThe Uplift War by David Brin
Alien protagonists
128 books — 63 voters
The Long Arm of Gil Hamilton by Larry Niven
Great Science Fiction Detective Stories
156 books — 77 voters

Spider Legs by Piers Anthony
Giant Monster Kaiju Novels
126 books — 29 voters

Virals by Kathy ReichsSeizure by Kathy Reichs
YA Books Far Better than Twilight
3,209 books — 4,865 voters
Greegs & Ladders by Zack MitchellThe Tar-Aiym Krang by Alan Dean Foster
Intriguing Aliens
263 books — 148 voters

Starship Troopers by Robert A. HeinleinOn Basilisk Station by David  WeberBolo by Keith LaumerBerserker by Fred SaberhagenShards of Honour by Lois McMaster Bujold
Best Military Science Fiction Books
714 books — 891 voters
The Rowan by Anne McCaffreyPegasus in Flight by Anne McCaffreyDragonflight by Anne McCaffreyJhereg by Steven Brust
Best Novels About Telepaths
206 books — 135 voters

Jinx on a Terran Inheritance by Brian DaleyThe Man-Kzin Wars by Larry NivenOn Basilisk Station by David  WeberGateway by Frederik PohlRingworld by Larry Niven
Excellent Space Opera
1,063 books — 3,741 voters