In this sense this was definitely the right book.
This is the story of Anna, a little girl that was conceived "in vitro" with the purpose of saving her sister affected by a rare form of leukaemia.
Being born with already a path in life affected the growth of this girl, who fights to find her identity, wondering between the love for her sister (that bring her to constantly give her blood, bone marrow and cells), and the love for her self.
In this struggle she decides one day to sue her parents, to acquire the right for her body and to be able to decide for herself about what and when she should be a donor for her sister. This decision lead to a big break into the family, with not always predictable implications.
Each chapter see the story from the point of view of a different character, and this, even if at times breaks the story, it's quite nice and engaging.
I was hoping in the famous "good end" to bring the spirit up, but unluckily, and trust me I am not doing any spoiling, it ends in a quite sad and unpredictable way.
I had seen the movie few years ago, with a great Cameron Diaz.
I suggest both the book and the movie.