The things 17-year-old Erin Post wants are drastically different from the things she needs. A junior in high school, Erin wants nothing more than to be thin.
In reality, she's a depressed girl with a serious eating disorder who needs to stop starving herself. When Erin's mother insists that she see a psychiatrist, Erin runs away to Chicago. There, she meets Lin and Ari, two homeless teens who show her that's there's a lot more to the world than being thin and fitting in.
Soon after making her new friends, Erin is given a choice. She can either help her new friends and risk having to face psychiatric treatment, or continue her path toward thinness.
A 2017 Golden Pen Award Nominee, THIN is a poignant story of self-esteem, courage and redemption.