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.

About the Author

Eric Saunders is one of the world's leading puzzle compilers. An expert crossword clue creator, IQ puzzle manipulator and innovator of many new puzzles each year. He has supplied puzzles to newspapers including The Times, is the author of many puzzle compilations for publishers around the world.