I just bought a book off Amazon called the "The Cornbread Gospels" it is very good with lots of different types of Cornbread...
What type are you looking for? Sweet, Hot, dense, fluffy.... I will try to look for a good one for you.
I bought it as a add on (amazon deal since I was buying the "Artisan Bread in Five Minutes a Day: The Discovery That Revolutionizes Home Baking" book that I saw reviewed in the local paper. I love it ... I have actually been doing alot more breads with ease!