These medium and hard sudoku puzzles have been designed for fun for all ages and can be played by children, adults and senior citizens alike - suitable for all intermediate and advanced 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 this sudoku puzzle book This puzzle book is an ideal challenge for the intermediate or advanced sudoku player and will provide hours of puzzling fun and enjoyment.