Who are we? Where is the boundary between us and everything else? Are we all multiple personalities? And how can we control who we become? From distinguished psychologist Robert Levine comes this provocative and entertaining scientific exploration of the most personal and important of all landscapes: the physical and psychological entity we call our self. Using a combination of case studies and cutting-edge research in psychology, biology, neuroscience, virtual reality and many other fields, Levine challenges cherished beliefs about the unity and stability of the self - but also suggests that we are more capable of change than we know.