Put your brain through it's paces with this Brain Gym book of 600 Sudoku puzzles, containing 300 medium and 300 hard difficulty. We exercise our bodies but our brains need a workout too Sudoku helps keep your brain healthy and functioning well. Challenge yourself to finish all the puzzles without cheating Solutions are printed at the end of the book. 4 puzzles per page. 8.5 by 11".
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