Next time you're in the gym perhaps you could ask the staff if there are any pro-bodybuilders there, perhaps you know a few yourself, you could ask them for advice or perhaps a trip to a nutritionist might help. I'm also going to state the obvious here but Joe Weider publishes several bodybuilding magazines which also discuss nutrition and advertise quite a few books which you may find interesting, you could try to see if you could borrow them from the library to see if they're worth buying.