A richly illustrated cultural and natural history of the lethargic animal—from prehistoric ancestry to modern-day memes. Sloths are perhaps the most recognized and loved Central and South American animals, but they are not well understood. This book offers a colorful and wide-ranging biological and cultural history of these fascinating mammals. Alan Rauch explores how today’s lethargic sloths evolved from gigantic prehistoric ancestors and earned their deadly, sinful names. In praise of both these beautiful creatures and their status as icons of a stress-free life, this book shows just how fascinating, engaging, and (more often than not) inspiring these animals can be.