Circular (triangular lattice) Maze - Book 1

Circular Maze - Book 3

Minecraft Idea a Day: Packed with Hundreds of Ideas to Inspire You!

Circular Maze - Book 4

Math Games, Grades 5 - 6

Circular (triangular - lattice ) maze - Book 3

The Everything Kids' Hidden Pictures Book: Hours Of Challenging Fun!

100 Rectangular Mazes (with solutions) - Book 4

The Everything Kids' Giant Book of Jokes, Riddles, and Brain Teasers

100 Rectangular Mazes (with solutions) - Book 5

Codes: How to Make Them and Break Them!

Circular Maze - Book 2

Doublets - A Word-Puzzle

Rectangular Maze - Book 6

Rectangular Maze - Book 3

The LEGO Christmas Games Book: 55 Ideas for Festive Games, Challenges, and Puzzles

Circular (triangular - lattice) maze - Book 5

What Goes Up White and Comes Down Yellow?: The funny, fiendish and fun-filled book of riddles!

Rectangular Maze - Book 9