Today, sudoku puzzles have exploded into a worldwide phenomenon. They appear in the New York Times, Daily News, USA Today, LA Times,and countless newspapers and magazines everywhere. There are web sites, fan clubs, chat rooms, and books. Perhaps someday there will self-help groups too. In any case, it looks like, sudoku is a phenomenon that is here to stay. Sudoku Addict contains 300 sudoku puzzles in easy, medium, and hard difficulty levels, and includes tips, hints, and strategies for solving sudoku puzzles. Printed in a handy 6x9 format, it is the perfect travel companion.