These medium and hard difficulty sudoku puzzles have been created for fun for all ages and can be played by children, adults and senior citizens alike - suitable for all sudoku puzzle lovers Perfect for stimulating the mind and improving reasoning skills, this book contains 200 medium and hard difficulty level sudoku puzzles with solutions for each of the puzzles. A 'Beginners Guide' is included providing valuable tips for solving the puzzles. Whatever your age, you'll love the medium and hard difficulty sudoku puzzles inside this book This puzzle book makes an excellent gift and is an ideal challenge for the intermediate and advanced sudoku player.