The Sudoku Gift Box contains four books compiled by Michael Mepham. Each book has 100 puzzles to solve and has a specific level of difficultly: Gentle, Moderate, Tough, Diabolical. Solutions are... This description may be from another edition of this product.
While there are many Sudoku books on the market, the small size of the books in this set are excellent for traveling. Each book is a different level of difficulty.
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