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Sudoku Rocks!
David Klein, author
Sudoku Rocks! is the complete Sudoku book: 500+ puzzles at eight levels of difficulty, expert instruction, alphabet and other specialty puzzles, dedicated website to complement the book--www.sudokurocks.com. You'll spend hundreds of hours enjoying Sudoku Rocks! By David Klein, the author of the award-winning Sudoku book Sudoku: Its Power Unleashed.