A well-known author of nature books considers different kinds of squirrels, how they behave, and what they look like; the book includes many indifferent b&w photos and a slightly easier text than Bare's Tree Squirrels (1983). Overall, Bare's book is superior: unlike Schlein's, it gives scientific names for the squirrels described, and it has a more extensive index and clearer, more interesting photos. Schlein's is acceptable as an additional purchase. Brief bibliography; index. (Nonfiction. 8-10)