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Books and articles on aphasia and its kindred thinking disorders abound, but it is difficult for the biologically minded neurologist to see very much that is new except for the observations that have come from callosal section, and some of the clarifications that have come from studying human examples of "disconnection" of one part of the brain from the other. This new volume provides a minimum of direct observations of neuropathology or epidemiology, but a maximum of psychological interpretations to support what is called a "deconceptualization of psychopathological disorders in terms of breakdown in hierarchic systems." Somehow these laborings strike one as efforts to provide scientific explanations for abnormalities whose nature still places them beyond the tools of modern science to analyze. The result is strained and unconvincing and one cannot help feeling that the book would have been better if it had confined itself to its very good review