1000+ Sudoku Puzzles for Adults: A Book With More Than 1000 Sudoku Puzzles from Easy to Hard for adults.

On the Edge: The Art of Risking Everything

The Impossible Man: Roger Penrose and the Cost of Genius

Sudoku Book for Adults - Large Print: Sudoku Puzzle Book with Solutions - The Perfect Challenge for All Skill Levels

The Ultimate Activity Book for Awesome Engineers: Tricky Brain Teasers, Mind Games and Logic Puzzle Book for Smart Adults (Perfect Gift for Engineers)

The Moscow Puzzles: 359 Mathematical Recreations (Dover Math Games & Puzzles)

Math Games with Bad Drawings: 75 1/4 Simple, Challenging, Go-Anywhere Games―And Why They Matter

Zen Genius Activity Puzzle Book for Adults: Large Print Logic, Math, and Word Puzzles for Relaxation

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

Sudoku Puzzle Book For Adults With Solution : A Book With two puzzles in one page from Easy to Hard For Seniors & Teens