Victoria Jamieson, aka Winnie the Pow, is a real-life Roller Girl (Dial, $12.99), and she channels her love of the game into her first middle-grade graphic novel. Twelve-year-old Astrid and her best friend Nicole spend most of their time together. When Astrid’s mom introduces them to roller derby, Astrid’s sure they’ve found their new passion. But while Astrid commits herself to the sport, Nicole moves on to other interests. The comic realistically reflects pre-teen life and friendship, and Jamieson’s bright art jumps off the page, vividly capturing both Astrid’s every-day routine and the thrilling action on the roller rink. Ages 10-14. Kerri Poore