SoSudoku.com Very Hard Puzzles: Book 1
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Paperback, 42 pages
$7.97
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Sudoku is the "the Rubik's cube of the 21st century" and the "fastest growing puzzle in the world". Try it out and find out why everyone is having so much fun! This spiral bound book has 72 Puzzles, all categorized as "Very Hard" difficulty. All solutions are provided.