The latest title in The Times Fiendish Su Doku series, this book previously unpublished quality Su Doku puzzles from the puzzle providers to The Times. Includes 180 Fiendish and 20 Super Fiendish 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. Perfect for the advanced solver in need of a constant supply of ultra-difficult puzzles, and guaranteed to provide hours of mind-stretching entertainment.