Fiendish Su Doku Workout

Wayne Gould is the leading authority in Su Doku – the man who transformed it from a Japanese number puzzle to a worldwide phenomenon. With its logic and varying levels, Su Doku – 'the crossword without words' – is the ideal challenge for your commute, your coffee break or your evening wind–down. The devilishly difficult, addictive puzzles in the Fiendish Su Doku Workout – including 150 previously unpublished – will test your logic and your brainpower to the limit.