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Reach all levels of Relax Sudoku until you become a Master
If you want to exercise your mind, improve your concentration levels and avoid the risk of brain diseases, this book is perfect for you
In this version we collect volumes 1 and 2 of Relax Sudoku Puzzles, in this third version you will find more than 1.200 sudoku puzzles that will allow you to increase your concentration levels, starting from the Beginner, Rookie, Normal, Expert level to become the MASTER level