personally, i suggest a FSM Chiltons and a haynes, they all have incomplete or hard to understand items that one of the other books explains better. so if you use all of them, things are a bit easier IMO.
My FSM is my #1 source of info (besides zcar.com of course) but my Chilton's comes in useful sometimes, both of them were purchased about 20 years ago. I have never had a Haynes though. Is it worth getting a Haynes too?