His full accounting does honor to the medical professionals around the country who've risked their lives to fight the virus, revealing America in all its vulnerability, courage, and potential.

     Thought of as the seat of our soul, then as a mysteriously animated object, the heart is still more a mystery than it is understood. Why do most animals only get one billion beats? (And how did modern humans get to over two billion, effectively letting us live out two lives?) Why are sufferers of gingivitis more likely to have heart attacks? Why do we often undergo expensive procedures when cheaper ones are just as effective? What do Da Vinci, Mary Shelley, and contemporary Egyptian archaeologists have in common? And what does it really feel like to touch your own heart, or to have someone else's beating inside your chest? Rob Dunn's fascinating history of our hearts brings us deep inside the science, history, and stories of the four chambers we depend on most.

    But its roots stretch back as far as ancient Greece, when medicine first departed from the divine and the mystical and moved toward observation and logic. Its early development was slow, constrained by the taboo around dissection (only external symptoms could be used for diagnosis), as well as superstition and mysticism (illness was the work of demons and pixies and curable only by penitence). Paul Strathern steers us skillfully through the maze of discoveries, diseases, and wrong turns that have made medicine what it is today—super efficient, high tech, and increasingly costly. A Brief History of Medicine offers an accessible history of the arguments, missteps, and dumb luck that led to the world's most important medical breakthroughs—from anatomy, grave robbing, the plague, and germ theory to vaccination, quackery, microorganisms, and penicillin.

    These areas of knowledge have converged into a modern theory of epidemiology that has been slow to penetrate into textbooks, particularly at the introductory level. Epidemiology: An Introduction closes the gap. It begins with a brief, lucid discussion of causal thinking and causal inference and then takes the reader through the elements of epidemiology, focusing on the measures of disease occurrence and causal effects. With these building blocks in place, the reader learns how to design, analyze and interpret problems that epidemiologists face, including confounding, the role of chance, and the exploration of interactions. All these topics are layered on the foundation of basic principles presented in simple language, with numerous examples and questions for further thought.