Build your logic and problem-solving skills--and have fun along the way--with this book of sudoku puzzles! With more than 160 puzzles and 3 levels of difficulty, this collection is sure to keep puzzlers of all experience levels busy for hours on end. Since each puzzle is spread out on one full page, solving will be easy on your eyes--but not on your brain! Spiral binding allows for easy puzzling, whether at home or on the go.