Start with a picture of a human head; read all about the outer surface of the brain beneath the skull and the protective fluid that encases it. Then, peel back the acetate page to reveal the same spread but with the next layer of brain tissue and central nervous system visible. This completely unique system of show-and-tell combines cutting-edge computerized photomontage and acetate technology with tried-and-true nonfiction subjects featuring material written, researched, and photographed by experts in each field.