Book Sudoku has 1200 grids with 600 grids of level 3, 600 of level 4, this book will allow you to make the most of your concentration and thinking skills while exercising your memory, Many hours of fun in perspective, with 2 levels of difficulty, easy and medium difficult, it will be the perfect tool to get started in the art of Sudoku and to progress as you go through the finished grids,
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