In this unique book, John Janovy Jr., one of the world's preeminent experts on parasites, reveals what can humans learn from the most reviled yet misunderstood animals on Earth: lice, tapeworms, flukes, and maggots that can eat a lizard from the inside, and how these lessons help us negotiate our own complicated world. Whether we're learning to adapt to adverse conditions, accept our own limitations, or process new information in an ever-changing landscape-we can be sure a parasite did it first.