Most Americans live in cities. The closest many get to wildlife is observing animals in parks and yards—the favorite habitat of the tree squirrel. Yet for all of the frequency with which they are observed, squirrels and their behavior are little understood. What do squirrels eat? How do they keep their food caches from spoiling? What is the most aggressive squirrel? Are there any squirrel-proof bird feeders? What role did squirrels play in ancient mythology?

From social interactions with early American cultures—both Native Americans and European settlers—to their role in local ecosystems, "Squirrels" provides animal lovers with the complete picture.