Consciousness, 'the last great mystery for science', has now become a hot topic. How can a physical brain create our experience of the world? What creates our identity? Do we really have free will? Could consciousness itself be an illusion? New developments in brain science are opening up debates on these issues, and now the field has expanded to include biologists, neuroscientists, psychologists, and philosophers. Using illustrations and lively cartoons, Susan Blackmore clarifies the complex arguments and illuminates the major theories.