Hard Sudoku puzzle book

Hard Sudoku puzzle book

is 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!

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.

400 enjoyable Hard Sudoku puzzles Hard level: 200 puzzles Extremely Hard level: 200 puzzles Keeps your mind active and performing well. Suitable for all levels: beginner to expert