Important, necessary reading for both patients and doctors: An important philosophy on the little-known principles that govern medicine is revealed by a Pulitzer Prize-winning author and one of the top cancer experts in the world?and how understanding these principles may empower us all. When Siddhartha Mukherjee was a young, worn-out, and isolated medical resident more than ten years ago, he came across a book that would fundamentally alter his perception of the medical field. Dr. Mukherjee was driven by the book The Youngest Science to confront a crucial, fundamental question: Is medicine a "science"? Science must have laws, which are assertions of reality derived from repeated tests and describing some defining characteristic of nature.