this was such a thoughtful book, yet good at the same time. one child is sick, and the other child cant be a doner. so the parents purposefully conceive a new daughter who will be able to be a doner to the sick one, and her life is really just mostly to live that role. the younger daughter sues to divorce her parents to get control of her body, a move which may kill her sister... and then there's the brother who is kind of ignored in all of it... it will leave you wondering what you'd do...