Just Another Girl: A Novel (Google eBook)
Aster Flynn is stuck. She has to spend all of her "free" time with her younger sister, Lily, who, though fifteen, is mentally handicapped. At age seventeen, Aster should be hanging out with friends, dating boys, and working at a fun job. But her dad's MIA, her mom is always at work, and her older sister Rose is too self-centered to give her any help. It's not that Aster doesn't love Lily--it's just that for once she'd like to be able to be a normal teenager.
So when a cute popular guy seems to take an interest in her, Aster hatches a plan. Somehow she has to get her workaholic mom and deadbeat dad to be the parents Lily needs so that Aster can have a life of her own. But can she ever get her parents to start acting like adults? Is this new guy worth the trouble? And, most importantly, will Lily get hurt in the process?
With its real-life characters and struggles, Just Another Girl will immediately draw teen girls in. Author Melody Carlson knows how to write to girls just where they are.