Megan Sparks je autorkou série Roller Girls. Jejím zameraním sú pútavé príbehy športových hrdiniek, ktoré ponúkajú čitateľom odľahčený a zábavný pohľad. Sparks sa vo svojej tvorbe sústreďuje na to, aby jej postavy boli sympatické a príbehy príťažlivé pre mladších čitateľov. Jej štýl je popisovaný ako svižný a plný energie, čo zaručuje čitateľom skvelú zábavu.
But she discovers a new passion - the exciting sport of roller derby - and makes friends with the cool and quirky girls on her team, the Liberty Belles. She also meets Jesse, the friendly boy who works at the roller rink, and Tyler, a cute all-American sports star.
Annie's roller derby team, the Liberty Belles, are finally on a winning streak. They plan a special Halloween bout with their arch rivals, the High Rollers. But Annie sprains her ankle - will it heal in time for the bout? At least Jesse is proving to be a good friend - he always seems to know exactly how to cheer her up.
Annie's broken up with Tyler and is nursing a broken heart. That's not all that's going on - Annie's roller derby coach has announced she will be selecting the best roller girls to form an all-star team. Annie really wants to be on it - but she knows her chances are slim. Coach organises a boot camp to help the girls prepare.
Annie and Tyler are going out! Her roller derby team, the Liberty Belles, are in top position in the league - but are they getting over-confident? Annie misses a few practice sessions so she can spend time with Tyler. The whole team needs to refocus - especially Annie.