The first section was reminiscences of the author's childhood, which was a lovely way to ground the dance tradition in a specific culture.
The second section gives an overview of the history of all time, and makes sweeping statements about large swaths of time and geography, with not much in the way of academic support.
The third section talks about how each body part is involved in the dance, and focuses more on imagery and philosophy than attempting to describe physical movements. This is a really nice section, and would be good to return to at various points in your dance journey. A book is not the best format for trying to coach specific movements anyway--but helping you to remember what the point is, bringing awareness, feeling, and intention to every body part, that's valuable.
The fourth and last section describes various types and contexts of dancing, which I enjoyed in a similar way to the first section. I'm glad I read it, but probably won't go back to it again.
The foreword to the book says "Belly dancing is an art and as such it entails three factors: theory, practice and the heart, without which no art form ever comes to life. This book is especially devoted to the first and third aspects of dancing, as they are often either neglected or totally ignored." I think it does a good job of achieving this aim. Just don't put too much weight in the bits of science or history that pop up every now and then.