I teach digital photography at a community college, both for college credit and in evening adult education classes, and have found this book to be the perfect textbook for my beginner and intermediate courses. The first Overview book is about 82 pages long, and provides a good introduction to digital photography. My students learn a little about digital equipment, how to acquire photos, do simple editing, organize them, and make prints. I generally either skip the second book or assign it for extra credit, because it talks about choosing a camera and accessories, setting up a computer, and working with printers and scanners.
The Taking Great Pictures chapters in the third book are the core of my curriculum for both the beginner and intermediate classes, as the content is easy to understand, explains photographic techniques clearly, and can be applied by any digital photographer. The beginner classes simply receive less challenging picture taking assignments, as they work with composition, close-ups, portraits, and sports photography. They also get a lot of use out of the section on scenic photography, as the landscapes here are spectacular.
The beginner classes stop when they finish the fourth book on the Basics of Image Editing. The more advanced image editing chapters, which use Adobe Photoshop Elements, are reserved for the intermediate classes. I do put both groups to work learning to restore old photos, because everyone seems to enjoy this.
All in all I have found this book to be a wonderful learning tool, and like it better than traditional textbooks for teaching digital photography.