The books you should probably have are the Hayne's manual, and /or the Chilton's manual. I have both for my 89, and they both come in handy. Where one lacks in pictures or details, the other will make up for.
I know the Haynes is available at Autozone, or you can probably get both at the book store. As far as routine maintanance, these books will tell you what should need attention. Then of course, there's always the owner's manual.