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Sudoku for Everyone: Easy to Understand Sudoku Solving - Kindle edition by McCollum, Philip. Humor & Entertainment Kindle eBooks @ Amazon.com.
Sinister Sudoku: More Than 1,000 Fiendishly Tough Puzzles: Longo, Frank: 9781435167742: Amazon.com: Books
Sudoku: Its Power Unleashed: Klein, David: 9781974213177: Amazon.com: Books
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