"Glass" by Ellen Hopkins

This is the sequel to "Crank," the story of how Kristina Snow met the monster, or crystal methamphetamine. Kristina's taking care of her new baby, studying for the GED and attempting to get her life back on track. She finds herself in a dark depression and she turns to the monster for temporary relief. Her addiction escalates and spirals out of control. This is a heartbreaking story of Kristina's struggle with drugs, and how her negative choices damage her body and her relationships with those she loves, including her young son. Powerful and disturbing.