Though nothing in the natural world would be quite the same without them, microbes go mostly unnoticed. They are the tiny, mighty force behind the pop in Champagne and the holes in Swiss cheese, the granite walls of Yosemite and the white cliffs of Dover, the workings of snowmaking machines, Botox, and gunpowder; and yet we tend to regard them as peripheral, disease-causing, food-spoiling troublemakers. In this book renowned microbiologist John Ingraham rescues these supremely important and ubiquitous microorganisms from their unwonted obscurity by showing us how we can, in fact, see them—and appreciate their vast and varied role in nature and our lives.

Though we might not be able to see microbes firsthand, the consequences of their activities are readily apparent to our unaided senses. March of the Microbes shows us how to examine, study, and appreciate microbes in the manner of a birdwatcher, by making sightings of microbial activities and thereby identifying particular microbes as well as understanding what they do and how they do it. The sightings are as different as a smelly rock cod, a bottle of Chateau d’Yquem, a moment in the Salem witch trials, and white clouds over the ocean. Together they summarize the impact of microbes on our planet, its atmosphere, geology, weather, and other organisms including ourselves, to whom they dole out fatal illnesses and vital nutrients alike.

In the end, Ingraham leaves us marveling at the power and persistence of microbes on our planet and gives credence to Louis Pasteur’s famous assertion that “microbes will have the last word.”

At a time when the complete human genome has been sequenced and when seemingly every week feature news stories describe genes that may be responsible for personality, intelligence, even happiness, Michel Morange gives us a book that demystifies the power of modern genetics. The Misunderstood Gene takes us on an easily comprehensible tour of the most recent findings in molecular biology to show us how—and if—genes contribute to biological processes and complex human behaviors.

As Morange explains, if molecular biologists had to designate one category of molecules as essential to life, it would be proteins and their multiple functions, not DNA and genes. Genes are the centerpiece of modern biology because they can be modified. But they are only the memory that life invented so that proteins could be efficiently reproduced. Morange shows us that there is far more richness and meaning in the structure and interactions of proteins than in all the theoretical speculations on the role of genes.

The Misunderstood Gene makes it clear that we do not have to choose between rigid genetic determinism and fearful rejection of any specific role for genes in development or behavior. Both are true, but at different levels of organization. Morange agrees with those who say “we are not in our genes.” But he also wants us to understand that we are not without our genes, either. We are going to have to make do with them, and this book will show us how.