Russo, Sam The Ultimate Sudoku Challenge: Large Print with 1000 Puzzles and Solutions with Easy, Medium, and Hard Levels for Adults, Seniors, Gifts, and Teens ... Brain Boosting Fun (Puzzle Escape Collection)

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MINDGAMES, LOLY 1000 Sudoku Puzzles Large Print for Adults: Easy, Medium, Hard & Expert Big Grid Puzzle: Book to Sharpen Your Mind.Ultimate Sudoku Challenge with ... Mindgames Sudoku – Large Print Collection)