1. Book compensation: If the library can't find the lost book, it needs to compensate for an identical or similar book. The library will provide a compensation list, which lists different kinds of books and their prices, and needs to be compensated according to the prices on the list.

2. Take responsibility: When borrowing books from the library, you must abide by the regulations of the library, such as returning the books on time and not damaging them. If books are lost due to violations, you need to bear corresponding responsibilities.