Brown Belt Kakuro: 150 Puzzles (Martial Arts Puzzles)

Ultimate Dot to Dot 1000 Dots: Connect The Dots For Kids And Adults | Hard Puzzle | Extreme Game For Children | Brain Activity Book | Logic Trace ... Activities | Animals | Scenes | Objects

1000+ BIG Sudoku Puzzle Book for Adults: Sudoku Book for Adults, Teens & Seniors. Over 1000 Sudoku Puzzles from Easy to Hard

The Complete Book of Origami Polyhedra: 64 Ingenious Geometric Paper Models (Learn Modular Origami from Japan's Leading Master!)

Origami Design Secrets: Mathematical Methods for an Ancient Art, Second Edition (AK Peters/CRC Recreational Mathematics Series)

Big Book of Extreme Dot-to-Dots: Our Hardest Puzzles Ever! 300 to 889 Dots

1000+ Sudoku Diabolical to Extreme Puzzle Book for Adults: A Book With 1000+ Sudoku Puzzles from Diabolical to Extreme for Adults.

The Magic of Math: Solving for x and Figuring Out Why

The Cryptoclub

Are You a Math Genius? The Inventor's Book of Calculation Games - For Brilliant Thinkers: 180 Pages of Mathematical Creativity for Ages 13 + ... Thinking Tree Books - Homeschooling Math)