Sharpen your mind with Sudoku puzzles! Sudoku is fun, relaxing and will keep your mind active for hours. We designed this book specially for you: Suitable for Beginner , Intermediate and Advanced Sudoku players Great variety of puzzles: 50 Easy , 125 Medium , 125 Hard , 125 Advance and 125 Extreme Includes bonus puzzles: 5 Flower Sudoku Puzzles 4 puzzles per page Large print 9 x 9 grid Solutions at the end of every level Perfect as a gift for the whole family and friends. With more than 500 Sudoku , this collection will surely keep you busy for hours. Are your ready for the challenge?