I want to recommend you a book that I'm reading recently, it is called: "The 26 Keys - The Magic of Astral Light (A new Approach to Astrology)' by David Coleman.
It is really an unique approach to Astrology from a Hermetic viewpoint.
I know David personally and he is a wonderful and very insightful Astrologer. In this book you'll find some things that you will never find in any other book of Astrology, it is really unique and I think that it will get high popularity among the Astrology admirers.
Here's a short description from Amazon:
This book presents a new and yet very ancient approach to astrology. Unlike the vast numbers of 'how to do astrology' books that have already been written, the course in this book is not merely an intellectual journey, but one which embraces the whole being in a dynamic magical interaction... Instead of being told about the influences over your life shown in a chart and having them described to you, this book enables you to actually experience the meaning of astrological influences for yourself and encourages you to draw your own conclusions. Within the pages of this book you will find all you need to begin exploring the Astral Light.
I don't know if I'm allowed to post a link from Amazon, but here's the tittle you can put on the search section on Amazon and you'll find the book:
The 26 Keys: The Magic of the Astral Light
by David Coleman