Sudoku keep your brain logical thinking, even at a young age. Sudoku improves critical thinking and making quick decisions based upon available evidence.Sudoku is not only fun and interesting. It is a brain game that helps to train the brain of you and your child. Sudoku also demands attention to detail - noticing patterns, and finding the right moment to make a move.This series have four different levels: easy, normal, hard, and expert. This book is easy level. if you need other level, please check "Mike Murphy Sudoku". Sudoku easy level vol.1 Details- Small Print (5x8) to easy take with- 30 Easy Level Sudoku Puzzles Collection- plus 2 Medium Level Puzzles for challenge How to play?The goal of Sudoku is to fill in the empty cells, one number in each, so that each column, row, and region contains the numbers 1 to 9 exactly once.Buy a copy today!