Sudoku Puzzle Book 500 Hard Puzzles: No Wasted Puzzles With Only One Level of Difficulty

Have fun while exercising your brain. Sudoku helps delay dementia by making your brain work in a different way and giving you a great sense of accomplishment. This single level book contains 500 puzzles. There are four puzzles per page and in case you get stuck the solutions are at the end of the book. 8.5" X 11"