I don't really read that much. But since you seem to like it so much, maybe I'll give it another shot. I saw an illustrated version in a book store once, so maybe I'll try that one too. I know it seems a bit childish, but I love it when a book has pictures to go along with it. I have a giant coffee-table-type book on evolution (it has to be at least 300 pages) and it's filled with neat explanations and wondeful illustrations. I always skip around when I open it because it's so fascinating.
EDIT: Here's the book. The reviews aren't very nice and I really don't know why.