Klepto

It seems like Kat's parents have done little but prepare for her sister Hannah's return since she was sent away to a home for troubled teens. Everyone is determined to find out what went wrong with Hannah and make things right again -- everyone except Kat, that is.
Kat dreads going back to a life dominated by her sister's tantrums and rule-breaking. The only place she feels in control these days is at the mall, where everything she wants is at her fingertips and no one is better at the art of stealing. As the time of Hannah's return approaches, Kat's shoplifting escalates into a full-blown addiction. Klepto is a powerful story from a talented new writer for teens.