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With a separate sudoku book for every level, this work helps puzzle lovers play this popular game. Taking a page from karate - another Japanese art, each title is graded by colour: White Belt for easy, Green Belt for medium level, Brown Belt for hard, and Black Belt for the super-tough solvers. Each book includes 300 puzzles.

| Best Sellers Rank | #445,101 in Books ( See Top 100 in Books ) #1,057 in Sudoku (Books) #2,358 in Logic & Brain Teasers (Books) #3,355 in Puzzles (Books) |
| Customer Reviews | 4.5 out of 5 stars 101 Reviews |
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