sudoku puzzle book for Senior

- 1000 Sudoku Puzzles large print with Answers included 100 Very Easy Sudoku, 100 Easy Sudoku, 100 Medium Sudoku, 200 Hard Sudoku, 200 Difficult Sudoku & 300 Insane Sudoku Puzzles | 295 pages | 6 sudoku per page | 9 x 9 grid