The Times Fiendish Su Doku Book 1: 200 Challenging Puzzles from the Times - The Times Su Doku Edition edition

Test your powers of logic with these challenging Su Doku puzzles. A collection of 200 previously unpublished Fiendish Su Doku puzzles.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. Guaranteed to provide hours of absorbing, brain-stretching entertainment.