Times Fiendish Su Doku Book 12

Test your powers of logic with these challenging Su Doku puzzles. You don't need to be a mathematical genius to solve the treacherous puzzles in this collection of Fiendishly difficult puzzles - it's simply a question of logic. The latest title in The Times Fiendish Su Doku series - previously unpublished quality Su Doku puzzles from The Times. Includes 180 Fiendish and 20 Super Fiendish puzzles. These will provide a stern challenge and take you to the next level. Since the first Su Doku puzzle appeared in The Times in November 2004, this classic game of logic has become a phenomenon, with over 5 million copies of the Times Su Doku series sold worldwide. Perfect for the advanced solver in need of a constant supply of ultra-difficult puzzles, and guaranteed to provide hours of mind-stretching entertainment.