Having spent twenty years as a full-time practitioner of internal and emergency medicine, Michael Palmer injects his bestselling novels -- like Extreme Measures and The Fifth Vial -- with an expert's authority that makes them all the more chilling. In our interview, Palmer talks about what he thinks draws readers to his brand of fiction. "[My] readers like to feel that they're inside of a world that they don't ordinarily have exposure to," he explains. "It's a chance not only to be entertained, but informed."