"Fairies don't live in groups that large. Even the Queenscourt isn't that big."
"The planet is a finite size and the population is growing. It's not practical for humans to avoid forming large communities indefinitely."
"Well, the fairy population grows, but I think much more slowly. And occasionally we do move to get farther away from each other."
And here is Sherlock casually breaking into it.
Promise is a little confused by the rigmarole associated with entering the building but doesn't comment on it.
So neither does Sherlock. And they proceed through the darkened halls to the library.
It has so many books! Promise flutters about, inspecting the books.
The books are organized according to bizarre and largely impenetrable local principles, but at least some of the divisions are recognizably by topic. The stuff on the easily visible shelves mostly doesn't obviously pertain to magic, but Sherlock goes behind the counter and starts pulling out piles of books manufactured in a less alien style; perhaps he knew where to find the good stuff.
Promise goes and looks at what he's pulled. "The organization system is weird," she comments.
"Some of it seems to be by topic, and it's grouped by author but the authors seem to be in random order."
"Well, I suppose you could tell me what order the symbols go in, and then I could memorize that, and then I could squint at all the titles, but... I'm not sure it wouldn't be faster just to read all the spines."
"I'm not actually speaking your language, in case that wasn't clear, I'm just plain speaking."
"It was obvious that something more complex must be going on than you just happening to natively speak English; it wasn't obvious which of the many possibilities was operative."
Here is a book about vampires. Here is a stack of books each about another common variety of demon. Here is a book about recognizing and thwarting dark rituals. Here is a book about potionmaking. And there are more where those came from.