Glass (Crank Series #2) by Ellen Hopkins

Crank. Glass. Ice. Crystal. Whatever you call it, it's all the same: a monster. And once it's got hold of you, this monster will never let you go. Kristina thinks she can control the urge, the addiction, the monster trying to drag her down. Now with a baby to care for, she's determined to be the one deciding when and how much, the one calling the shots. But the monster is too strong, and before she knows it, Kristina is back in its grips. She needs the monster to keep going, to face the pressures of day-to-day life. She needs it to feel alive. Once again the monster takes over Kristina's life and she will do anything for it, including giving up the one person who gives her the unconditional love she craves- her baby. A vivid portrait of a victim to addiction, this sequel to Crank is the continuing story of Kristina and her descent back to hell. Told in verse, it's a harrowing and disturbing look at addiction and the damage that it inflicts.