"Oh?" Ah, he's got a slight idea who this might be, but not the details. In any case, the offer of help gets a smile - with his own book selection leaning towards world history, it's a good sign. Of course, he could find them himself, he's sure, but...
"Only if it wouldn't be any trouble. I don't suppose you could direct me towards any of-" And he points out the titles he needs on his list. "These?"