http://www.oup.com/us/companion.websites/0195171934/?view=usa
This book is a lot to read, but is written in layman's terms. If you really want to understand your medication options and how the medications work, this is the book for you. Just remember that it was published in 2005 and there are new treatments on the horizon every week. This really helped me understand the doctor's strategies and I was better able to communicate and participate in my care.