Sudoku 4

Give your brain a workout with these entertaining and challenging puzzles. Hugely popular around the world, Sudoku requires no linguistic or mathematical knowledge, but challenges your logic and reasoning skills. 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.

Gareth Moore is the author of a wide range of brain-training and puzzle books for both children and adults, includingThe Brain Workout, The Kids' Book of Crosswords, The Little Book of Puzzles, andTrain the Brain. He also writes the monthly magazine Sudoku Xtra and runs the puzzle website www.puzzlemix.com. He gained his Ph.D at the University of Cambridge, UK, where he worked on machine intelligence.