Sudoku, Volume 4

Give your brain a workout with these entertaining and challenging puzzles. These all-new puzzles, arranged in order or difficulty, will test and entertain Sudoku novices and experts alike. Easy to learn but trickier to master, these puzzles help you to keep your brain healthy by giving it a regular workout. The perfect companion for the work commute, holidays, or rainy afternoons, here are over 200 puzzles just waiting to test you.