Book excerpt: "As a kid, Dr. Ben Carson always knew he wanted to become a doctor. But that didn't seem likely. He had a nasty temper. He hung out with a bad crowd. Today Dr. Carson is a brain surgeon. He performs operations so difficult they are practically medical miracles. He has separated twins who were joined at the head. He performs a kind of surgery that involves removing half of a patient's brain. How did Dr. Carson turn his life around? It's an amazing story."--back cover.