Apes—to look at them is to see a mirror of ourselves. Our close genetic relatives fascinate and unnerve us with their similar behavior and social personality. Here, John Sorenson delves into our conflicted relationship to the great apes, which often reveals as much about us as humans as it does about the apes themselves. From bonobos and chimpanzees to gibbons, gorillas, and orangutans, *Ape* examines the many ways these remarkable animals often serve as models for humans. Anthropologists use their behavior to help explain our fundamental human nature; scientists utilize them as subjects in biomedical research; and behavioral researchers experiment with ways apes emulate us. Sorenson explores the challenges to the complex division between apes and ourselves, describing language experiments, efforts to cross-foster apes by raising them as human children, and the ethical challenges posed by the Great Ape Project. As well, *Ape* investigates representations of apes in popular culture, particularly films and advertising in which apes are often portrayed as human caricatures, monsters, and clowns. Containing nearly one hundred illustrations of apes in nature and culture, *Ape* will appeal to readers interested in animal-human relationships and anyone curious to know more about our closest animal cousins, many of whom teeter on the brink of extinction.