Book Bears

Book bears are tiny bears that chew books and ruin them with typos. They are described as having a million teeth and are the color of pages. They are used as a security system in Meridian Library, and are controlled by the Greenwich Mean Time.

While being able to ruin a written story is one of their abilities, they are also capable of destroying the history of a person, as was demonstrated when a Book Bear bit Saturday on the thumb, causing him to slowly lose most of his history, and thusly his memory alongside his identity. This can be solved by an editor, who can rewrite the story back to its original form.