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Review title: Great book for exercising your brain
Product review: To me, sudoku has subtle, mysterious powers: I feel that it helps my ability to concentrate. Maybe any enigmistic puzzle has that benefit, but sudoku is what did it for me.This book has a great variety of puzzles from easy to really hard and their solutions. It also has some puzzles that are small variations on the traditional sudoku puzzle.I recommend this book. After a year I still have plenty of puzzles to work on and I have never found a flawed puzzle.
