"The Powerpuff Girls" is Cartoon Network's highest-rated show among kids 2-11. It's a mega-hit! And so are Scholastic's books -- last year's Valentine Book hit #9 on the NY Times Kids' Bestsellers.Halloween is Blossom, Bubbles, and Buttercup's favorite holiday. What could be more fun than dressing up and getting free candy? Buttercup can't wait to put on her costume -- she's going as her favorite villain, Mojo Jojo.But on Halloween evening comes... Townsville's villains attack! Now it's up to the Girls to find those bad guys and kick them out of town. But with everyone in costume, it's hard to tell the real villains from the fake ones! Can the Girls save Halloween for the kids?