This is a good book on strength training, which reminds me of Fleck and Kraemer's "Designing Resistance Training Programs" (DRTP). While Zatsiorsky says that he tried to write this book for the coach, he admits that there is more science in it than he would have liked. In my opinion, it is more theoretical than DRTP, which I found to be a scientific, but more practical book.
There are things here that you won't find in Fleck and Kraemer's book, but I think the average practitioner would find DRTP more useful overall. Although I'm not really an expert myself (I'm an interested layman), I think this book would mainly be of interest to strength and conditioning experts, and to those with a keen interest in comparing former-Soviet vs. western training ideas. I may have been inclined to give this book five stars if I hadn't already read DRTP and "Essentials of Strength and Conditioning", both of which I think are slightly stronger than this book.
On the other hand, Arthur Drechsler in the annotated bibliography of his "The Weightlifting Encyclopedia" says this about Zatsiorsky's book: "A very interesting and imaginative work by one of today's best thinkers and researchers on this subject, especially in the area of training for increased power." He lists DRTP without comment, so I have to assume he liked this book better.