Daelomin2: I printed and assembled the code wheel but I still don't get it. All the code wheel gives you is two 2-digit numbers like, for example. 45 and 23. What you're supposed to do with these two numbers the code wheel outputs I have no clue.
I saw somebody else streaming gameplay yesterday, and rather early on (before he got to the adventurers guild house) he found a page with a numbered list of items. I completely bet that is the key you are looking for.
Also there's a farmer who keeps repeating the same 3 vegetables. I don't remember but I think it was something like cabbage carrot potato. At first I thought it might be a recipe, but once that list was found I'm guessing it's a combination for something.