As a non-professional who has nonetheless colored her hair at home for many years, I didn't feel as if I got anything new out of this. Tips like, "prepare your area" and "use a protective cream around the hairline" are so basic, you'd have to be completely new to hair color not to know that. On the other hand, I've never been bold enough to attempt my own highlighting so I read through those sections to see if it was doable.
Unfortunately, the directions for various techniques were unclear and there weren't enough pictures to show what she meant. I still feel completely in the dark about how to highlight my own hair. The colors that you have to choose from are only a few for each shade range (dark brown, light brown, dark blonde, light blonde). If the color you want is not in the book, she won't show you how to achieve it. Also, your hair has to be virgin (not already colored) to follow her recipes. She does not even go into different options for coloring hair such as semi-permanent, demi-permanent, etc.. All recipes are for permanent hair color. I've actually learned quite a bit more about hair color reading and researching on the internet than by reading this book.
Overall, I am disappointed. At least the book makes a nice coffee table book for your girlfriend's to look through and I would recommend it to anyone who is completely new to coloring hair as it is definitely meant for the novice (except for the highlighting and advanced techniques which are suited only to professional stylists). Don't expect to find even a very basic explanation of the color wheel or underlying pigments. Overall, not what I expected. I was really hoping to find insider secrets but did not find them here.