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Su Doku, the wordless crossword in the "New York Post," the "Washington Post," the "Boston Globe," and "USA Today" has taken the puzzle world by storm. This is a collection of 100 puzzles that have not been published in the U.S., ranked in order of difficulty.

Grand Master Sudoku 2 2005, HarperCollins Publishers

ISBN-13: 9780060893293

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