"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!
Tracey West is the New York Times bestselling author of Dragon Masters, a series in the Scholastic Branches line. She has written more than 400 books for kids, including the Pixie Tricks series and the Underdogs series with Kyla May.
Some readers also know Tracey for writing books based on animation such as Pokémon and LEGO Ninjago.
She currently lives in the western Catskills of New York with her husband, Bill; their adopted dogs; and a whole mess of chickens.