"Oh, I see," he said, nodding. He wondered what had happened in her past that meant she took refuge in the printed word? In his experience, it was always the bullied ones who became bookworms - but did her love of literature start at school, or later in life? She was such a timid thing he'd bet that something had happened to make her distrust the world in general.
"You're right, there aren't usually many people in here - just a few dedicated readers - and the librarian, of course!" Sweet old ghost that she was.