Brain Builders and Memory Enhancement Puzzle Books from Chipmunkee Puzzles. This SUDOKU puzzle book offers 100 moderate difficulty puzzles. If you've never done them before, you may want to start with some of our easy books. Once you get going, you'll find that they're addictive. Once you build your confidence and skill with the easy and mediu ones, you can find another of Bunny's Book of Brain Benders. We have multiple volumes of...
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