Wolf, a professor of child development at Tufts University, integrates psychology and archaeology, linguistics and education, history and neuroscience in a truly path-breaking look at the development of the reading brain-a complicated phenomenon that Wolf seeks to chronicle from both the early history of humanity and the early stages of an individual"s development ("unlike its component parts such as vision and speech... reading has no direct genetic program passing it on to future generations"). Along the way, Wolf introduces concepts like "word poverty," the situation in which children, by age five, have heard 32 million less words than their counterparts (with chilling long-term effects), and makes time for amusing and affecting anecdotes, like the only child she knew to fake a reading disorder (attempting to get back into his beloved literacy training program). Though it could probably command a book of its own, the sizable third section of the book covers the complex topic of...