Then I am myself the world What consciousness is and how to expand it

In this challenging head-trip, neuroscientist Koch (The Feeling of Life) opines on the nature of consciousness. He makes the case for integrated information theory, which holds that "consciousness is unfolded intrinsic causal power," or "the ability to effect change." Unfortunately, the theory's nuances get lost in the jargon-filled discussion that follows ("What exists for itself is the spatio-temporal grain that maximizes integrated information"). Koch fares better when addressing more tangible issues. For instance, he tackles the question of when consciousness begins by noting that though preterm infants will respond reflexively to certain stimuli, they don't wake up if pricked to draw blood until "well into the third trimester," suggesting that's when consciousness, or at least the conscious experience of pain, begins. Refuting the possibility that digital technology can become sentient, Koch argues that the three or four connections between each transistor in a digital computer are too primitive to compare with the hundreds of thousands of connections between neurons in the mammalian brain. Elsewhere, the author discusses the power of psychedelics to expand the mind and the difficulties of determining if unresponsive hospital patients are conscious. While the theoretical material is frustratingly dense, the more down-to-earth sections intrigue. This will spark conversation, if not always understanding. Agent: Don Fehr, Trident Media Group. (May)

"Consciousness" implies a state of being aware of oneself and one's place in the world. This state happens when complex bodily systems involving the brain and nerves continually work together throughout a person's lifetime. Neuroscientist Koch (The Feeling of Life Itself) examines many angles of consciousness. For example, he discusses how emotions and perceptions begin, how humans rely on their own realities as they evolve, why near-death and mystical experiences are important, and the potential benefits of psychedelics. In one chapter, he speculates about the potential of computers to replicate human consciousness and to be programmed for use beyond a person's death. His extensive research supports his ideas and conclusions. For readers who want to learn more, there's a huge notes section at the end of the book that details the sources of Koch's research. VERDICT Easily the most current, thorough, and helpful exploration of consciousness available. Koch's light, simple, yet authoritative writing style will appeal to general audiences as well as scientists and researchers. An essential, highly recommended purchase.--Steve Dixon