The human brain remains the last great unconquered frontier of science. Somehow, that mass of grey sludge locked inside our skulls creates a whole inner world heaving with emotions, memories, ideas and desires. Everything we see, touch, hear and fell -- the illusion of reality -- is generated by this inscrutable organ. For centuries scientist have probed the brain, searching for clues that might shed light on its mysterious workings. Recently, however, with the advent of modern technology and developments in neuroscience, the brain has begun to yield its secrets. The time is ripe to start to make sense of how the brain becomes a mind and how it accounts for our uniquely differing personalities. In this highly readable and often mind-boggling tour, Susan Greenfield brings the reader up to date on the latest theories and controversies.