Collapse by Jared DiamondThe Ancestor's Tale by Richard DawkinsThe Greatest Show on Earth by Richard DawkinsFreakonomics by Steven D. LevittGuns, Germs, and Steel by Jared Diamond
Best Science Books - Non-Fiction Only
1,930 books — 3,630 voters
The Lovely Bones by Alice SeboldThe Time Traveler's Wife by Audrey Niffenegger
Best Books of the Decade: 2000s
7,272 books — 28,374 voters

The Decline and Fall of the Roman Empire by Edward GibbonThe Rise and Fall of the Third Reich by William L. Shirer
Best Non-Fiction (no biographies)
6,331 books — 8,173 voters