jsconyers, I mentioned a couple of books earlier in this thread. Dr. Sean Carroll is a professor of evolutionary biology at the University of Wisconson - Madison. He has written two widely acclaimed books on evolution. Both for the lay person. Here is a website that you might find useful in choosing one of his books to read.
Carroll lab
I would start with
Endless Forms Most Beautiful: The New Science of Evo Devo. It's a really good read.