Most Popular Books
- The Original Area Mazes: 100 Addictive Puzzles to Solve with Simple Math—and Clever Logic!
- The Big Puzzle Book of Area Mazes: 300 Mind-Bending Puzzles in Five Challenge Levels
- Amazing Area Mazes: 70 Race-the-Clock Puzzles for Budding Math Wizards
- The Original Area Mazes, Volume 2: 100 More Addictive Puzzles to Solve with Simple Math—and Clever Logic!
- Ninki koshi ga oshieru rikeino no tsukurikata.
