[from here]

There was no sign of other patients in the Sun Room, meaning it was possible that Rita and her companion were the first. That was just what Rita didn’t want. It meant she couldn’t know if any monsters or brainwashed patients were lurking around, and if they were, she and the old man were going to get their full attention.

“Don’t make too much noise,” she cautioned Skulduggery in a whisper. “You never know what could be hiding in here.” Unfortunately, their flashlights probably drew plenty of attention too, which meant they needed to be fast. Treading lightly yet quickly, Rita started toward the entrance to the library, watching the darkness for signs of danger as she moved.