4.5 stars! 
 A sweet story about Astrid, a girl on the cusp of entering middle school, who discovers a passion for roller derby. Deeper than that, we learn about her relationships with her best friend, her mom, her enemy, and her new friends. The ups and downs and drama of tween girl friendship reminded me of when I was in 6th grade, though I was never a good skater, and hadn't heard of Roller Derby. There's some humor in Roller Girl, along with a (predictable) happy ending. 
 I loved the colorful detailed artwork. I loved how Astrid finds her way and matures a bit. I loved how authentic the story felt. As a bonus, I didn't realize until the end that the author is a bad-ass skater with the Rose City Rollers. So very cool. 
 More, please, and soon!