135 Mixed-Difficulty 6x6 Grid Brain Game Book Puzzles (Easy, Medium & Hard)

Inside are 135 clean, satisfying 6x6 Sudoku puzzles ranging from easy to medium to hard, giving you the perfect mix of warm-ups, brain-boosters, and full-on challenge rounds.

This book fits effortlessly in your bag, purse, backpack, or even a jacket pocket, making it the ideal brain game companion for flights, road trips, waiting rooms, coffee breaks — basically anytime you want to level up your logic on the go.