A new mass market edition of the USA Today bestselling series.USA Today and Los Angeles Times bestsellers and featured in Entertainment Weekly"s "Must List," The Big Book of Su Doku series includes original puzzles from easy to extreme, for users and addicts of all ages. The Big Book of Su Doku #1 features 200 brand-new puzzles, arranged in increasing order of difficulty, from the easiest Mini Su Doku puzzles up to the new 16 x 16 Super Su Doku. It also contains tips and basic rules to get you started.