How much can you love a sister?

13-year-old Anna Fitzgerald is going to sue her own parents. Why? To stop them from using her as "spare parts" for her older sister, Kate, who suffers from leukemia. After years of having her bone marrow and blood used to keep Kate alive, Kate's illness requires a kidney transplant and Anna has had enough. She loves her sister but she has her own life to live. Are her parents asking too much? The courts will decide. My Sister's Keeper is by Jodi Picoult.