"This book lets us peer into the world of microbes -- not as germs to be eradicated, but as invaluable parts of our lives -- allowing us to see how ubiquitous and vital microbes are: they sculpt our organs, defend us from disease, break down our food, educate our immune systems, guide our behavior, bombard our genomes with their genes, and grant us incredible abilities. While much of the prevailing discussion around the microbiome has focused on its...