Su Doku Gold (Su Doku Medal Quartet)

Su Doku Gold is the third title in a new series of books from the Su Doku master, Wayne Gould. The race is on as Su Doku Gold poses an even greater challenge, testing your brain power & stamina to the limit in this Difficult collection of
puzzles.
Tougher and addictive as ever, Su Doku Gold is guaranteed to push you beyond your mental comfort zone.
The original creator of The Times puzzles, Wayne Gould is the leading authority on Su Doku and is the man responsible for transforming this Japanese number puzzle into a worldwide phenomenon. Gould's success resulted in him being listed as one of Time magazine's most influential people in 2005.
Containing 150 previously unpublished puzzles, Su Doku Gold is the third of four collections designed to exercise the brain and test your logic.