To test the limits of our ability to inhabit lives that are not our own, Charles Foster set out to know the ultimate other: the nonhumans. To do that, he chose five animals and lived alongside them, sleeping as they slept, eating what they ate, learning to sense the landscape through the senses they used. In this lyrical, intimate, and completely radical look at the lives of animals, Charles Foster mingles neuroscience and psychology, nature writing and memoir, and ultimately presents an inquiry into the human experience in our world, carried out by exploring the full range of the life around us.