Reader'S Digest: Brainstretchers 4 - Sudoku Plus: Exercises for a Fitter Mind!

Get your brain firing on all cylinders with these mind-bending puzzle books. Each full-colour volume contains more than 200 puzzles and mental challenges specially designed to improve memory, concentration, logic skills and powers of observation. Featuring a wide selection of puzzles, including crosswords and sudoku, these books are the perfect way to stay sharp and banish boredom.