sudoku puzzle 4 levels:200 puzzle 4 levels of difficulty (easy, medium, hard, very hard) this sudoku puzzle book for adults and kids (sudoku puzzle 2017).sudoku puzzle spiral books is packed with the following features: 200 Puzzles All Solutions 4 difficulty levels from beginner to expert This Book Contains 50 Beginner, 50 Novice, 50 Moderate and 50 Advanced difficulty Sudoku Puzzles with answers, for beginners and experienced Sudoku Puzzlers. You don't need to be a math whiz to enjoy a great sudoku puzzle Sharpen your mind and have some fun with this great collection of sudokus, including over 200 challenges across four difficulty levels