The aims of this book are grand indeed. Rolls addresses such questions as, What are emotions? Why do we have emotions? What are the rules by which emotion operates? What are the brain mechanisms of emotion, and how can disorders of emotion be understood? Why does it feel like something to have an emotion? Why is the brain built to have reward, and punishment, systems? How does the brain produce behavior by using reward, and punishment, mechanisms? And in fact he does succeed remarkably well in presenting a synthesis of experimental data to elucidate many of these questions.