Buy Maths Books for Puzzles
Difficult Riddles For Smart Kids By M Prefontaine
Math Riddles For Smart Kids By Cooper The Pooper
Logic Workbook for Gritty Kids
Fun and Challenging Mazes for Kids 8-12
Mazes For Kids Ages 8-12 By Splendid Youth
Amazing 3D Mazes Activity Book By Russ Focus
Mazes For Kids Ages 8-12 By Jennifer L Trace
Fun Mazes for Kids Ages 6-10 By Cobb Design
Math Curse By Jon Scieszka, Lane Smith
Riddles for Smart People: 100+ Original Puzzles
The 125 Best Brain Teasers of All Time
The Grapes Of Math By Greg Tang