This book, Bird Songs Bible: The Complete, Illustrated Reference for North American Birds, measures 14.9 x 13.9 x 2.1 inches and weighs about 10 pounds. Ironically, a note on page 24 states:
The American Birding Association's Code of Birding Ethics instructs birders: 'Limit the use of recordings and other methods of attracting birds, and never use such methods in heavily birded areas, or for attracting any species that is Threatened, Endangered, or of Special Concern, or is rare in your area.' Although birds are used to hearing others' songs and calls, please keep in mind when enjoying this book that frequent playback in heavily birded areas can disrupt natural rhythms. Limit your playback accordingly."
Remember the size and weight? This is NOT a book that any person will take into the field. And that, in many ways, is its problem.
The book is designed to illustrate 747 species of North American birds (including Hawaii), give a few cursory comments about the description, distribution, habitat, behavior, and vocalizations (less than 20 sentences in total for each species), and then provide an index number that, when entered in the attached playback device, will play a short or single rendition of a call or song. The numbers on the device are rather hard to see, and the whole book, of course, as well as the attached device, is not waterproof nor moisture-proof. As I said, it is not a field guide.
Okay, let's call it a grand tabletop book. There still is a paucity of information for such a large book, and the illustrations are not exactly the best artistic depictions. From a competition perspective, there are a number of other devices for storing and playing birdsongs (including a nice iPhone app) as well as nicer tabletop books. The playback device doesn't come off (isn't portable), which would be a nice touch.
I like many of the song selections, but some were a bit strange. For example, how could a recording of the California quail not include the cu-CA-cow assembly call?
All in all, the entire product is underwhelming. It's just bird song overkill. And the lack of utility for something that is supposed to be at least somewhat utilitarian is problematic.
Don't throw away your field guides.