A bit of anti-bullying is included in this book and it's done very well. Considering that it's a child's book, everything does wrap up fairly neatly, but I'm pleased that the bully doesn't become friends with the people she's picking on. I love realism in my fiction (when done right) and it would not have made sense.

Spoiler

The bully is praised for her activism (she starts a petition and gets a good number of signatures) and standing up for what she thinks, but then it's explained that she's going about it the wrong way (deliberately trying to hurt people) and told that just because she thinks something different doesn't mean she's right or that she will get her way just because other people agree with her.

This is definitely something children should be reading in this day and age.