In "Secret Agents: The Menace of Emerging Infections," author Madeline Drexler takes us deep into the world of fast-moving microorganisms that can sicken people and end lives before doctors, hospitals or health agencies know what hit. Drexler shows "the bugs" at work in a well-chosen group of past and potential public health crises, including the West Nile virus's surprise hop across the Atlantic and the inevitable next influenza pandemic. With clarity and style, Drexler depicts in detail the characters in each drama: the amazingly adaptable bugs and the scientists and agency officials who must face them down. Meticulously researched, "Secret Agents" presents not only the scientific, but also the historic, political and economic contexts of approaching the seemingly intractable public health issues raised by the bugs. In the end, Drexler writes, such problems can only be addressed in a global context, in the interests of both rich and poor countries and the people who inhabit them. A fascinating read.