Bill Calvin writes with elegance, economy, and authority. In The Cerebral Code, he has solidly embedded his ideas in experimental neurophysiology and neuropharmacology, deriving from his decades in the laboratory. He explores the ramifications of his insights into a wide range of cerebral functions, such as sleep, dreaming, awareness, problems solving, creative thinking, and the dynamics of nerve cell assemblies that make consciousness possible. Calvin has written primarily for his colleagues in neuroscience, as well as for lay readers. I believe he will achieve his aim, by recounting in adequate detail the basic concepts from which he is reasoning, and thereafter exploring ideas and issues that his reductionstically minded colleagues have largely ignored.