Bad News Bike — Tracey West

"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.

Professor Utonium has a present for the Girls -- bikes! Buttercup in particular can't wait to start riding. But she just can't seem to learn! So she gives up. But when Mojo Jojo invents a special gravity machine that takes away the Girls' ability to fly, Buttercup will have to face her bike-riding fears -- or else!