One of the newer field guides, this one has lovely illustrations and maps all on the same page for ease of use. It also shows birds in different poses - very helpful! It is a bit heavy to carry in the field, but the quality is worth the weight! The library also owns his guide to birds of Western North America.
By Roger Tory Peterson and Virginia Marie Peterson
"In celebration of the centennial of Roger Tory Peterson's birth comes a historic collaboration among renowned birding experts and artists to preserve and enhance the Peterson legacy. This new book combines the Peterson Field Guide to Eastern Birds and the Peterson Field Guide to Western Birds in one volume, filled with accessible, concise information and including almost three hours of video podcasts to make bird watching even easier."