*Starred Review* About 90 mammals, from Aardvarks to Zebras, are described in these volumes. Each article includes several components: a “Profile,” with introductory information; a discussion of anatomy, with diagrams; a discussion of habitat; descriptions of various behaviors; and a consideration of factors determining survival. Each article also has numerous boxed sections to draw attention to important or curious facts as well as many color photographs and other illustrations. Both students and librarians will find this straightforward alphabetical arrangement easy to use. Volume 20 is the set index and contains a list of resources for further study, a glossary, and, in addition to the comprehensive index (which is repeated in every volume), several special subject indexes—“Animal by Common Name,” “Animal Behavior,” “Habitats,” “Places,” and an especially useful “Animals at Risk.
