"No worries," Ken said, past the point of putting on his customer service persona, especially for someone he vaguely recognised from school. She seemed amiable enough, and was already on his good side for getting out of here on time and apologising for almost being late. He pulled the stamps over and opened the first of her books. "Got your library card?"
It wasn't the fastest of processes, since a wizard library naturally had no computers. Luckily, they did have magic, which made up for it a bit. At least she only had two books; he eyed the customer at the other end of the library, who was reading contentedly in a chair with a stack of at least a dozen as his elbow. "No need to apologise," he added. "You could be that guy. Anyone who realises that it's not good to be that guy is a friend of the library."