Even more books? "Excellent. And are there any in here currently that you would like to set aside for immediate use, either yours or others? If so, I will make note of the number and catalogue them when they are returned." That way he'll be sure not to miss any.

Are there mostly novels? Histories? Books of Craft lore? Recipes? He's curious what kind of people live here, or have lived here. What kind of books are in the caches? And once there's an accurate list of what they do and do not have, what sorts of books will he be looking to acquire? These are all questions for later, but ones his curiosity brings up nonetheless.