- Maphead: Charting the Wide, Weird World of Geography Wonks 625 copies, 39 reviews
- Brainiac: Adventures in the Curious, Competitive, Compulsive World of… 491 copies, 22 reviews
- Because I Said So!: The Truth Behind the Myths, Tales, and Warnings Every… 170 copies, 11 reviews
- Ken Jennings's Trivia Almanac: 8,888 Questions in 365 Days 77 copies
- Maps and Geography (Ken Jennings' Junior Genius Guides) 18 copies, 2 reviews
- Greek Mythology (Ken Jennings' Junior Genius Guides) 17 copies, 1 review
- U.S. Presidents (Ken Jennings' Junior Genius Guides) 11 copies
- Outer Space (Ken Jennings' Junior Genius Guides) 6 copies
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