Do they have a copy of Harry potter and the goblet of fire hardcover at the store in the back or something like that?

I would say yes but you can ask their friendly and always helpful staff.

Yes

They should have and if they don't, you can always ask them to special order it for you. There's no additional cost for this service and you can pick it up at the store.

Call the store and ask. You could probably even look online. Good luck.. BUT. without looking I'm gonna say they probably do. They have heaps of HP merch.

njust call snd ask