Extreme Sudoku Puzzle Book If you are an expert at Sudoku but want an extra challenge then you will love our Extreme Sudoku Puzzles. Featuring 156 Puzzles of 3

From Nikoli, the Japanese puzzle company that created the sudoku craze, comesa title that starts at hard and goes to a level of difficulty not seen in anyprevio

Can't get enough of Sudoku? This book is for you! It contains three hundred challenging and devilishly difficult Sudoku puzzles in a portable paperback. Feature

The first in a new series: hard puzzles for serious sudoku solvers. Do you have what it takes? These 200 challenging sudoku puzzles from Will Shortz will keep y

Extra tricky. Extra tough. It's the sudoku collection that's not for the faint of heart. If you're craving the challenge, sharpen your pencil and pit your wits