A good workbook helping photographers to find out what it is they want form a portrait. In this way it scratches a good bit deeper than the standard how-to-light-and-pose books. And there are any amount of those that will show you how to flatter the sitter and carve a semi-pro career. If that's what you are looking for you should look elsewhere. And then use the two books in tandem. The book achieves what its title states, Practical through the exercises and Theoretical by helping you to learn to look and inquire. The theory here does not refer to lighting or camera. I run workshops for photographers on a variety of subjects and this is a useful book to help design content so classes can have that little extra .