'My Sister's Keeper' by Jodi Picoult is an excellent novel and a subject ripe for discussion on MN! - I read it in 3 days and throughouly enjoyed it.
The story in a nutshell is of a family with two children Jesse 4 and Kate 2 - Kate is diagnosed with nasty form of leukaemia - they have a further genetically designed baby, Anna, for stem cells from the umbilical cord in an effort to save Kate - but it goes on over the years.
When Anna is 13 Kate needs a kidney transplant and Anna says enough and sues her parents for medical emancipation.
It's well told story without being over dramatic and it really makes you think of the moral dilemmas involved.
A bloody good read!