In all thirteen years of Anna’s life, her parents have never given her a choice: she was born to be her sister Kate’s bone marrow donor and she has always given Kate everything she needs.

But when Anna is told Kate needs a new kidney, she begins to question how much she should be prepared to do to save the older sibling she has always been defined by. So Anna makes a decision that will change their family forever – perhaps even fatally for the sister she loves.

From internationally bestselling author Jodi Picoult comes a masterpiece which asks us just how much we should do to care for the ones we love.