I think that it depends on the library, usually. I believe that at most free libraries, the cost can range from $10-$20. Ask your local librarian if you are not sure.
You can lose your library book on the way to school or in your very own house, maybe even your car. You can lose the book anywhere you go if you're not responsible.
If you DID lose your library book you would have 2 ways of going about it:1. Find it quickly and hand it back to the library before it becomes overdue or2. Go to the library and apologise and pay for...