I really enjoyed this graphic novel. It's about a young girl between her fifth and sixth grade school years. It's the summer, and she's decided to do a Roller Derby summer camp! 
 There are only a few problems. 
 1. She's never really skated before, and she's kind of bad at it. 
 2. Her best friend in the whole world is more into boys and ballet than roller derby 
 3. She doesn't know how to tell her mom about number 2. 
 Astrid goes to Derby camp, though, and it's brilliant. This isn't a book where the main character suddenly gets fabulous over night at a new skill. It's about how Astrid doesn't know who she really is, or who she wants to be. About how she's really mad that her best friend has decided to make nice with her worst enemy (yuck!) 
 Astrid does improve, and she learns a bit about who she is, and who she wants to be along the way. 
 I think my very favorite part of the book was Astrid's super cool mom. She's very understanding, and she encourages Astrid to communicate with her, and she's also very concerned with Astrid being a whole person, and not just a boy crazy doof that a lot of girls become when they enter junior high. 
 I high recommend for anyone about to go into junior high, and for everyone who's been there.