Sudoku is the new logic game sweeping the nation--and the world! It's like a crossword puzzle with numbers--but no math is involved. The book has wipe-off pages and a pen, so you can play the games over and over again. Or, if you make a mistake, wipe off the square without tearing a hold in the paper! Level 2 book is filled with medium, hard, and even a few very hard puzzles for those who really want to test themselves.