Sudoku Book 1,200 Puzzles, 300 Easy, 300 Medium, 300 Hard and 300 Extra Hard

Sharpen up your mind and improve your memory by playing Sudoku every day. Sudoku stimulates your mind, increases concentration and makes you feel happy by giving you a sense of accomplishment. It is said it can also reduce the chance of developing Alzheimers. This Sudoku puzzle book contains 1,200 puzzles, with four levels of difficulty to help take your game to the next level. There are 4 puzzles per page and solutions are at the end of the book.