- Actually, the reshelving would be a big deal. In library terms, that's your stocktake. (They even get called that. No, really.) It's your chance to discover what books have gone missing, which ones are damaged, etc. Topping off that is that every other time we've seen books get discovered, it's been alphabetically. (Pinkie Pie in Elements of Harmony 2: "It was under E-eeee!") But Twilight quickly starts dividing them by subject. This isn't just a reshelving: She's planning to re-catalogue her entire collection! As an experienced librarian, this troper can say with confidence that trying to do that in one afternoon is the kind of task that defines Herculean.
Fridge / My Little Pony: Friendship Is Magic S2 E10 "Secret of My Excess"