Does the subject want to ask, "What measures have been taken by 16 library to borrow books?" Additional overdue fines, suspension of borrowing authority and legal measures.

1. Extra overdue penalty: the library will impose overdue penalty on overdue books according to the agreement signed when borrowing books. These fines will be calculated according to the number of days overdue and the value and type of books.

2. Suspension of borrowing authority: the overdue borrowing of books is serious, and the library will suspend the borrowing authority of the reader until the arrears are returned or other agreements are reached.

3. Take legal measures: If the reader fails to return the book for a long time, the library will take legal measures to recover the book and impose a fine.