The puzzles in this collection of treacherously difficult puzzles will stretch even the most advanced Su Doku enthusiast. You will need to use all of your best

These are previously unpublished quality Su Doku grids from the puzzle providers to The Times, and help to develop you to take on Extreme Su Doku. The 200 puzzl

200 New Puzzles -- From Fiendish to Super Fiendish Su Doku, "the crossword without words," comes with a warning: it is seriously addictive. You don't need to be

A collection of 200 previously unpublished Fiendish Su Doku puzzles. Perfect for the expert solver in need of a constant supply of ultra-difficult puzzles. Guar

Positive brain game. Suitable for adults and children. 6 puzzles per page. 1002 hard. 8.5" X 11" Book. (215.9mm X 279.4mm). Thick paper. Glossy cover. Killer Su