How many books are in this library? solo finished

The first time December remembered being in a library as big as the one he was walking into at the very moment was when he was much, much younger. The library back then had seemed so large, each shape around him five times his size, from the books, their shelves, the walls, the couches...

He figured that must've been why walking into the Hogwarts Library gave him a rush of deja vu; because back when he was only a foot tall, the normal sized shelves seemed huge... But now that he was four or five times that height, the shelves here were somehow the same. It wasn't that they were still too small (or at least they hoped), but that the library at this school was simply just enormously expansive and grand.

As he ventured further into that world of books, he started absentmindedly looking at the titles on the shelves. He recognized some, though of course, it's hard for one to walk into a library without recognizing the title, cover, or author's name on at least one book, but what surprised him entirely was how many he didn't recognize. It was putting him off for a while until he finally placed the thought:

There were entire rows of shelves full of books he'd never read, or even heard of before! And it only further delighted them once they remembered that the purpose of a library was to read the books in it... Which meant they could probably pick a book from any of the hundreds of shelves of books and read it!

December ended up wandering for a long time to find a book, though it wouldn't have taken as long if they'd just grabbed one and stuck with it... But it felt as if each book was more interesting than the last! Eventually he decided to pick one at random and find a cushioned seat, which was evidently a good decision both for his tired feet and for mellowing down. As he curled into the plush chair and opened the book, it sunk in how lovely of a place to be Hogwarts was.