Mistreating Library Book = Contempt of Court

If, that is, the book belongs to the Illinois Supreme Court library; Illinois Supreme Court Rule 33 provides,

The librarian of the library of the Supreme Court shall not permit any person except judges of the court to take any book from the library without the consent of the court or the chief justice. No books shall be marked or underlined, nor shall the pages of any book be folded down. Any person who offends against the provisions of this rule is in contempt of the Supreme Court.