Forms part of a series of books which feature acetate windows that take the reader right into the heart of the subject. This title reveals the facts about various sharks and rays. It asks: What makes sharks such deadly hunters?; and did you know that rays stun their prey with electricity?
I also got Reptiles from the same series. They have those transparent sheets with layers of anatomy on each sheet (skin, muscles, skeleton, organs) that always made the A volume of old encyclopedias the best. Rays have some of the weirdest skeletons. The text is at about a sixth grade level.