I have a friend who told me about a book I just read.
It's called My Sisters Keeper by Jodi Picoult. It's about a daughter that has Leukemia and the parents have another baby, genetically engineered to give them the cord blood to save the other sister.
It brought a lot of issues to the forefront -- about what you would do in the situtaion if one of your children faced dying, would you put another child in pain to save that child.
Anyway, I really liked it. I definately recommend it -- for the times when you're ready for a heavy book -- this is most certainly not a light read.