The Times Fiendish Su Doku Book 18 : 200 Challenging Su Doku Puzzles

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Test your powers of logic with these challenging Su Doku puzzles.The latest book in The Times Fiendish Su Doku series – previously unpublished quality Su Doku puzzles. 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.