Cheney and Seyfarth enter the minds of vervet monkeys and other primates to explore the nature of primate intelligence and the evolution of cognition. "e;This reviewer had to be restrained from stopping people in the street to urge them to read it: They would learn something of the way science is done, something about how monkeys see their world, and something about themselves, the mental models they inhabit."e;-Roger Lewin, Washington Post Book World "e;A fascinating intellectual odyssey and a superb summary of where science stands."e;-Geoffrey Cowley, Newsweek "e;A once-in-the-history-of-science enterprise."e;-Duane M. Rumbaugh, Quarterly Review of Biology