A 2010 graphic novel for upper elemenatry kids into middle school is called Smile by Raina Telgemeier. There isn't a kid wearing braces that can't relate to the story, which is autobiographical. There is an added complication for our main character, Raina, in that she has an accident right before the braces go on and has to have teeth replaced. Even if you aren't a big reader of comics, this is very accessible. The reader is able to follow the cartoon in a linear manner, the story is the trials and tribulations of adolescence, but Raina is able to grow and learn from her experiences with friends, bullies, family and her Smile. I think you will enjoy this book.