Sudoku Puzzle Book For Adults & Seniors 500+ Medium to Hard Sudoku Book is a puzzle game that trains the brain, reduces the risk of Alzheimer's, relaxes, and refreshes, and helps calm down in stressful situations and gain energy. Sudoku Book is a fun game for all ages that can be played anytime, anywhere at several levels of easy, medium, and difficult. Features of This Book: 500+ Sudoku puzzlesThere are Two difficulty levels: medium, and difficult.All Solutions are IncludedInches: 8.5 x 11Matte Finish
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