"[Mr. Quammen] is not just among our best science writers but among our best writers, period." —Dwight Garner, New York Times The next big human pandemic—the next disease cataclysm, perhaps on the scale of AIDS or the 1918 influenza—is likely to be caused by a new virus coming to humans from wildlife. Experts call such an event “spillover” and they warn us to brace ourselves. David Quammen has tracked this subject from the jungles of Central Africa, the rooftops of Bangladesh