The librarian is standing by the book cart, which is loaded with books for reshelving.
"I think I saw the book thief," Mina says.
"What, just now?"
"When you were shelving?"
"No, afterwards. I mean..." Mina falters as she realises what she's said.
She blushes and looks away. Miss Ver Susa folds her arms.
"Tell me what happened."