Jumbo Sudoku Variants Puzzle Books: 750 Puzzles of Sudoku X, Hyper, Twins, Triathlon A, Triathlon B, Marathon, Samurai,12x12 and 16x16 AUTH-13407724 ISBN10: 1472573102

ISBN10: 1472573102

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Jumbo Sudoku Variants Puzzle Books: 750 Puzzles of Sudoku X, Hyper, Twins, Triathlon A, Triathlon B, Marathon, Samurai,12x12 and 16x16 AUTH-13407724 ISBN10: 1472573102This Jumbo Sudoku Variants Puzzle book contains a top quality variety of sudoku puzzles that are guaranteed to challenge you in the best way possible. Sudoku puzzles are a proven method for enhancing logic skills. As a logic puzzle, Sudoku is also a great brain game. If you play Sudoku every day, you'll soon begin to see improvements within your concentration and overall brain power. You could reduce your probabilities of Dementia or Alzheimer's