Project Hail Mary by Andy Weir
Best Books of the Decade: 2020's
2,926 books — 5,465 voters
The Girl With the Dragon Tattoo by Stieg LarssonAngels & Demons by Dan    BrownThe Godfather by Mario PuzoThe Lovely Bones by Alice SeboldThe Firm by Robin Waterfield
Best Crime & Mystery Books
7,318 books — 15,668 voters

The Martian by Andy WeirReady Player One by Ernest Cline
Best Science Fiction of the 21st Century
1,246 books — 8,992 voters
Harry Potter and the Deathly Hallows by J.K. RowlingGone Girl by Gillian FlynnOdd Thomas by Dean KoontzThe Hunger Games by Suzanne CollinsHarry Potter and the Half-Blood Prince by J.K. Rowling
Best Books of the 21st Century
9,847 books — 22,042 voters

1984 by George OrwellHarry Potter and the Sorcerer's Stone by J.K. RowlingAnimal Farm by George Orwell
Best Books of the 20th Century
7,899 books — 49,786 voters
Six Years by Harlan CobenStay Close by Harlan CobenThe Litigators by John GrishamMemory Man by David BaldacciFinders Keepers by Stephen  King
Best Books of the Decade: 2010s
7,688 books — 14,221 voters