Sudoku calms you down. Sudoku keeps your brain healthy. Sudoku protects you from alzheimer's. Sudoku allows you to spend quality time. Sudoku is a passion. You can enjoy the pleasure of solving Sudoku with the carefully prepared "SUDOKU for a Healthy Brain" series. There are two puzzles of ideal size on each page. The solutions to all puzzles are listed at the end of the book.
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