This bumper sudoku collection contains more than 450 puzzles just waiting to be solved. With a variety of grids across five increasing levels of difficulty, there's something for everyone, whether you're already an expert or new to the game.

• IMPROVE YOUR SOLVING SKILL: Each puzzle is graded, from beginner to expert, so you can enjoy the satisfaction of seeing your skill improve as you work through the levels.
• EXERCISE YOUR BRAIN: Give your mind a great workout as you find where each missing number fits.
• REDUCE STRESS: Feel your stress melt away as you focus on these satisfying puzzles.