Outdated and poorly written, I found this book to be a big disappointment. Many topics relating to the professional esthetician were not thoroughly covered or were not covered at all. In many instances, the author was incorrect in the scientific aspects of the book. Many things were not fully explained. It seemed as if the author wrote the bare minimum in order to complete a book. The only skin care discussed was a facial. This is a basic skill taught in cosmetology school. Check out Milady's Standard Textbook for Professional Estheticians instead. I found it to be a much better text.