Sandra Markle's Inside Outside series is well written and an excellent addition to a child's library. The text is well written and helpful, but the pictures are particularly well chosen for teaching new material for children who may already have read or studied animals at a school age level. For example, this book shows several pictures of a snake eating an egg, detail pictures of teeth, anal scales, windpipe, lung, heart, and inside an egg. Well done and worth exploring other titles in the series!