This book was incredibly fun nonfiction to read. While of great interest to anyone with a bioscience bend, you don’t have to be scientifically minded to enjoy this book. Indeed, the concepts contained in this work are laid out for everyone to enjoy and access. In fact, Rob Dunn often waxes nearly poetic in his passion to imbue this book, and his readers, with knowledge. There are also many footnotes containing esoteric, yet highly amusing, information. For centuries, humans have tried to live apart from the world, cleaning, dousing, shaving, medicating away any other living organism on or near our pristine bodies. But perhaps that has not been the wisest course; after all, the human body, and it’s immune system, evolved over millennium to coexist with these little, microscopic organisms. In this book, this taboo subject is covered.