The relative scarcity of substantial juveniles concerning the human nervous system gives this book particular value. Concentrating upon the brain, McNeel nevertheless covers a variety of topics (e.g. the growth of connections between nerve cells, the operation of the reflexes). The verbal portion is clear and concise. The diagrams are well chosen although there are several instances where others might have been added (i.e. the discussion of EEG graphs would have benefitted from a facsimile of such a chart). Several related and currently interesting topics are also discussed in some detail, including the comparison between the operation of computers and that of the human brain. Attesting to the fact that few suitable books for the age level have appeared, the bibliography for this one is almost completely made up of references from Scientific American and Life magazines; in itself it is a valuable resource.