The Nastiest Sudoku Book Ever

The book is thick newsprint that erases easily and cleanly. The spine stayed in tact even being opened daily for a year. While not labeled as such the puzzles do seems to be in an order where the easiest are first. Although you will find some easy ones mixed in the higher numbered ones. Don't think these early are puzzles you will breeze through. They probably equate to New York Times Hard puzzles. I am usually one that goes in order from front to back but I had fun choosing where in the book to try next. With over 500 puzzles the book lasted me almost exactly a year. Pencils ready!!