Secrets of Truth & Beauty by Megan Frazer
When Dora Cohen was 7 she won the title of Little Miss Maine, to her parents she was "Little Miss Perfect". At 17 Dara is far from perfect, she is now plus sized and angry. After getting an assignment from her English teacher to do a multimedia project about her life, she jumps at the chance to make a statement about how society views overweight people. Embarrassed and humiliated her parents pull her out of school and make her go to therapy. Dara has had enough of her overbearing parents and decides it's time to leave. She contacts her sister Rachel, whom she has never met and has been estranged from their parents for many years. Over the summer she learns about her sister, her family and herself.
This is a great book, a story of acceptance of both yourself and others.