The Big Puzzle Book of Area Mazes : 300 Mind-Bending Math Puzzles in Five Challenge Levels

Mazes for Clever Kids : More than 100 puzzles to boost your brainpower

The Great Big Book of Really Hard Puzzles : 256 Pages of Mind-Twisting Mazes, Logic Games and Hidden Pictures Puzzles, Highlights Activity Book for Kids Ages 8 and Up

101 MAZE ACTIVITY BOOKS

The Everything Kids' Math Puzzles Book : Brain Teasers, Games, and Activities for Hours of Fun