"It's all knights, princesses and dragons," grumbled the troll, tossing aside another book.
"This one's full of prissy elves and inaccurate unicorns. Look, here's a painting; it's not even stained brown and matted with burrs. And no hoof spurs," complained a goblin from deeper within the library wagon.
The librarian explored deeper in the tiny yet sprawling internal space eventually returning with armfuls of books where the 'monsters' win.