I consider this book an excellent introduction for anyone who is starting to do serious photography and for the occasional serious photographer who may not have previously done portrait photography.
The author opens with basic information about equipment and camera settings. I like that he emphasizes that an expensive camera is not a requisite for successful imaging. He then discusses composition including how to direct a model, elements of lighting, and some basic rules of composition. There is a discussion of the merits and techniques of street photography. The last section discusses photo editing.
In addition to my opening comment, this would be a good text for an Introductory Course at the high school or college level.