Insomniac's Su Doku (Paperback)

100 brand new puzzles from the Su Doku guru, Wayne Gould Perfect for making good use of sleepless nights, this book of addictive puzzles ranges from easy to brow-furrowingly fiendish and will satisfy on every level. Devised by Wayne Gould, the original creator and leading authority on su doku puzzles. There are puzzles here for all levels ranging from easy, through mild and difficult to fiendish, plus Wayne Gould's guide to solving su doku, to give you all the tips and techniques you need to crack the next level. Once you get going, it'll make even sleepless nights worthwhile!