Wintergirls by Laurie Halse Anderson

Lia and Cassie are the best of friends. They do everything together, including making a bet to see who can be the skinniest. After an argument causes them to stop speaking for several months, the bet isn't over. In fact, Cassie takes the bet too far. Lia is left cold and alone to remember how Cassie tried to reach out to her. Could Lia have helped her? Can Lia help herself? This is a powerful book with an all too believable cast of characters that will leave readers rooting for Lia and her recovery.