Exactly what it says on the tin: the stories behind the development of a wide variety of drugs, including ones that are no longer in use. Many of the stories are fascinating, and some of them are nearly soap operatic in the level of backstabbing involved between the researchers. The tone is very conversational, which is especially helpful when Li delves into the science. He doesn't shy away from the hard science involved, so some sections of the book were a bit over my head. Since the book is divided into sections, first by the type of drug and then into smaller sections by each individual drug, this is the sort of book that could easily be read a little bit at a time, or read all at once in a few days. Short and satisfying, it'll remind you just what it takes to get a single effective drug to the people who need it.