David Karn Sudoku – Extreme Vol 1: 100 Puzzles, Extra Large Print, 42 pt font size, 1 puzzle per page: Karn, David: 9781078333085: Amazon.com: Books
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365 Extreme Sudoku Puzzles: Your Daily Puzzle Book - 2020 Edition (Sudoku Puzzles for Solving and Enjoyment): Cicero, Sam: 9781089414629: Amazon.com: Books
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