This is much more than a book on sun sign interpretation, it is also a study in human psychology.
The author has broken down each sun sign into three sequential evolutionary stages of development of one's soul. It's like looking at all of your lives lived and the ones yet to be lived, as one single grand journey. This book is more than a portrait of the soul as the title suggests it is also a road map of the soul's journey as well.
Breaking the sun signs down like this is a totally new approach. It explains why people sharing the same sun sign are not more or less the same in temperament and ambitions.
The book also goes into great detail of your early childhood conditions that I found incredibly accurate.
The author has been a professional Astrologer for over twenty years. The book seems well researched and is easy to understand. No prior knowledge of astrology would be required to get something out of this book. If you need insight into yourself or a loved one, or want to know why your boss is such a jerk, you'll find the answers here.