Clean - Amy Reed

From the author of Beautiful, a poignant, captivating novel about five teens in rehab.
Olivia, Kelly, Christopher, Jason, and Eva have one thing in common: They're addicts. Addicts who have hit rock bottom and been stuck together in rehab to face their problems, face sobriety, and face themselves. None of them wants to be there. None of them wants to confront the truths about their pasts. And they certainly don't want to share their darkest secrets and most desperate fears with a room of strangers. But they'll all have to deal with themselves--and one another--if they want to learn how to live. Because when you get that high, there's nowhere to go but down, down, down.