You laugh nervously, "k-knock, knock?"
Suddenly she's in your face, "Did Pinkie send you?"
"Oh, good," she sighs, before getting a little uptight again, "I mean, not good, that I yelled at you, but, good that she didn't send you. Sorry, sorry for yelling at you like that. It's been…" she sighs, "It's been a long day. But I'm sorry, what did you need?"
"I, uh, was looking for the library."
She immediately brightens, "Oh, well this is it! Ponyville Library run by yours truly, Twilight Sparkle!"
She beckons you indoors, though you're hesitant to follow, and she apologizes yet again as you walk inside.
"If you haven't met Pinkie yet, you will one of these days. And you'll understand why I was yelling just now. Maybe."
"Anyway, this is the library and is also my home here in Ponyville! If you ever need a book, just drop by and make a request! I can usually find it right away, but if it takes longer than that I can have it ready to you for the next day. Just bring them back in the condition they're given to you in, and bring them back once you're finished or within two weeks, and we'll get along just fine."
The inside of the library is quite large, with rows and rows of bookshelves on the outer walls. It smells of tea, musty paper, and wood. There are plenty of windows and a lot of rather comfy looking reading places scattered about the multiple floors.
"The second floor is mostly my sleeping quarters," Twilight says when she sees you looking upstairs, "Mine and Spike's anyway. There are books up there but mostly my personal stash of favorites."
"Oh, if you don't know me then you probably haven't met Spike either. My apologies," she says, bowing her head slightly, "Let me go get him so you know who he is, should he be here and I'm not around to answer the door."
With that, she heads upstairs to retrieve her co-worker.
Moments later she comes back downstairs, "Spike's on his way down with some tea now, so if you like you can have a seat and join me."