Do you like to use your spare moments indulging in Sudoku? If so, Colormazen Sudoku Puzzle Book will be your perfect take-anywhere companion. With 200 puzzles guaranteed to sharpen your mind and keep you thoroughly entertained, this collection is a real treat for anyone who loves Sudoku. Are you ready to rise to the ultimate brain-training challenge? Working the puzzles in this book can provide a vigorous mental workout for virtually everyone from teenagers to senior citizens, all while fitting within the theme of Sudoku. Included in Colormazen Sudoku Puzzle Book Volume 4: - --50 Easy Sudoku Puzzles --50 Medium Sudoku Puzzles --50 Hard Sudoku Puzzles --50 Very Hard Puzzles -- And so much more! Activate your brain cells and grab a pencil - Colormazen Sudoku Puzzle Book Volume 4 is here to provide you hours of challenging entertainment, one page at a time!