Endowed through evolution with large brains, the great apes (chimpanzees, bonobos gorillas and orangutans) and the cetaceans (dolphins and whales) are second only to humans in intelligence. In this delightful and intriguing book, dolphin specialist Bearzi and primatologist Stanford discuss the similarities between these groups. Both use tools, have sophisticated means of communication and cooperation, solve problems innovatively, transmit cultural traditions to the next generation and are able to imitate others. Like humans, apes and dolphins form complex social networks, and they are capable of deception and manipulation. The authors cite many examples: dolphins hoard objects in order to get treats or wear sponges as protective masks as they forage; apes use twigs to extract termites from termite mounds, chimpanzees cultivate alliances with group mates to dominate their communities. In the final section, Bearzi and Stanford survey the factors making dolphins and apes endangered species, and they make a plea for conserving the ecosystems in which they live, because the beautiful minds of these creatures are a terrible thing to waste.