Nikoli Publishing (Author)
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November 01, 2009
4.18 X 6.12 X 0.98 inches | 0.56 pounds
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About the Author
Nikoli is the Japanese puzzle and game company that's been nurturing and developing sudoku for over thirty-five years. They hold the trademark on sudoku in Japan, and supply 100 percent of the puzzles published in Japanese newspapers and magazines.