My daughter has lost the book we borrowed for her, and we don’t know what to do.

You can renew your book five times. (if it is not booked) That is, the search period is about 5 months.

If the book cannot be renewed and cannot be found, it should be replaced.

The price of the book can be paid to the library by card or you can buy a new one of the same book. 

You can find the contact information and opening hours of the libraries: https://www.helmet.fi/en-US