Lets challenge your Brain! The provided difficulty scale (Author's rating) on the front cover allows you to find the best fits for your skill level. Book features: * 1 20 puzzles hard level for adults. * Big grids and fonts , two puzzles on each page. * Includes solutions for every puzzle at the end of the book, in case you get stuck. * The good companion for morning coffee, your lunch break, a rainy Sunday, and vacations. * Small size book, a great companion for traveling. * Easy to tear out, thanks to wide margins * Great gift ideal for lovers of Sudoku
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