Pocket Penguin Sudoku 3: The Perfect Book of Protable Puzzles

The mini marvel of Sudoku books is back! Here are 200 brand new puzzles to get your grey matter going, with five levels of classic games ranging from the enjoyably easy to more challenging to the pencil-snappingly hard. This portable pocket-sized delight will make sure your mental agility is on top form and keep boredom at bay. Wherever you are, you'll never need to be without a sudoku.