Big Book of Sudoku - Hard to Expert - 1000 Puzzles

Big Book of Sudoku - Hard to Expert - 1000 Puzzlesis a perfect funny Sudoku book for adults.
Would you like to improve your logical skills? Love hard Sudoku puzzles? Then you'll love this book! If you're looking for a sudoku book for beginners, here's the perfect first sudoku puzzle book for you!
Why play Sudoku?
✓ Sudoku gives your brain the ultimate workout.
✓ It keeps you and your mind healthy and productive.
✓ It helps to maintain and improve your memory.
✓ It also can increase your concentration and focus.
1000 enjoyable Sudoku puzzles Hard level: 500 puzzles Expert level: 500 puzzles Keeps your mind active and performing well. Suitable for all levels: beginner to expert