He tossed it back on the pile.  “Bet they have a newer copy at the Canterlot Library.”  He traced a claw over the crossed-out Royal Library stamp on the book, looking at her deliberately as he did so.  “Might wonder when you got there why you’d bothered to bring it at all.”  He hooked a claw into the spine of another book—also a Royal Library discard—and pulled it towards himself.  “Of course, that’s Future Twilight’s problem.”