"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.

Like father, like... clone?

The Powerpuff Girls' archenemy Mojo Jojo has come up with his most sinister scheme yet. He's created a miniature clone of himself! Mini-Mo is only half Mojo's size, but unfortunately for the Girls, he's every bit as evil his creator. Can Blossom, Bubbles, and Buttercup defeat Mojo plus one mo'?