What's more satisfying than solving challenging sudokus? Sudoku puzzles offer a perfect mix of entertainment and brain gymnastics at the same time.
The brain is like a muscle.
It's getting stronger the more you train it.
Solving sudoku puzzles is a perfect way to train your brain and make sure you stay sharp.
This sudoku puzzle book is designed for you who want challenging - but not too challenging - sudokus.
It's only one puzzle per page, with plenty of space in ea.