Butterfly Bookby Donald and Lillian Stokes and Ernest Williams The Stokes Nature Guide books are very popular for their illustrations, information and writing style. The Butterfly Book tells you how to identify and attract common species, with lots of color photographs, and includes two butterfly garden plans.
Peterson First Guide to Urban Wildlifeby Sarah Landry If you're going to attract wildlife to your backyard you should really read one or both of these book so you'll know what you're seeing. They include mammals, birds, insects, plants, reptiles and amphibians and their habitat needs, food, family needs and more.