Copyright 1997 and therefore somewhat dated in 2008, the book is still terrifying. It traces the history of deadly infectious disease (bubonic plague is specifically detailed, as is malaria, cholera, and yellow fever); to the creation of "superbugs"; and the history of AIDS up to the point of publication.
I found the chapter on the emergence of hidden viruses fascinating - Ebola, Marburg, Lassa fever - and how man's own actions may be responsible for the emergence of these particularly gruesome (and almost always deadly) diseases. It also somewhat briefly addresses measures taken in the past, as well as those needing to be put in place in the future, to avoid the spread of all infectious disease.