500 sudoku puzzles for adults with solutions: 500 Easy+ Medium+ Hard+ Difficult sudoku puzzle book large print with solutions

500 Easy+ Medium+ Hard+ Difficult sudoku puzzle book large print with solutionsPlay this Sudoku puzzle book when you want to improve your memory and concentration. Sudoku can improve your ability to solve problemsfeatures:* Large print* 4 types: Easy+ Medium+ Hard+ Difficult* 500 puzzles with solution* 9*9 grid* size- 8.5*11 inch* 6 puzzles per page* 8 answers per page* 147 pagesenjoy