"Twelve-year-old Astrid has always done everything with her best friend Nicole. So when Astrid signs up for roller derby camp, she assumes Nicole will too. But Nicole signs up for dance camp with a new friend instead, and so begins the toughest summer of Astrid's life. There are bumps and bruises as Astrid learns who she is without Nicole ... and what it takes to be a strong, tough roller girl."-- Provided by publisher.

"Dizzy is a fifteen year old who wants to be the best! The best at what? She hasn't figured that out just yet. When one idea after another fails, she's ready to even give up roller skating -- until the Negatrixes attack! Under the mantle The 'Burb Defender, Dizzy finally has a chance to be the best, but only with the help of her skating crew: Chipper, Scarlett, Payton, and Av. First, she'll need to learn how to use her colorful powers endowed by the...