Provides an overview of the commonality of life on Earth. Inspired by the idea of symbiosis in evolution, the book explores the challenges and behaviors shared by creatures from bacteria to humans and all those in between.

Elizabeth Marshall Thomas, an anthropologist and animal behaviorist, has published thirteen previous books, including the New York Times best seller The Hidden Life of Dogs, Dreaming of Lions, The Tribe of Tiger, The Old Way, and The Hidden Life of Deer. Her most recent book is Tamed and Untamed: Close Encounters of the Animal Kind, coauthored with Sy Montgomery. She lives in Peterborough, New Hampshire. Learn more at elizabethmarshallthomas.net.