I bought copies of this guide for both my husband and daughter, and they're both extremely pleased. We especially like the small size of the book. This makes it easy to carry in a car glove box or a backpack. Also, we like the way the birds are categorized. If one is curious about a particular bird, the color of the bird is all that is needed to begin the search. However, if one knows the name of a particular bird and is wondering if the bird being observed is this bird, it is extremely easy to find a picture (both male and female) by looking up that name. For example, after using this book, my daughter discovered that the red-headed woodpeckers that she was enjoying in her backyard, were in fact hairy woodpeckers. Because of its sensible format, I think that this book would also be helpful to youngsters interested in identifying different birds.