As a librarian, I want to add a book, so that I can keep track of new books in the library.

## User Story:
>- As a librarian, I want to add a book, so that I can keep track of new books in the library.

## Steps for Demonstration:
>- The user clicks the "Add new book" button in the librarian's dashboard
>- Enter the book details in their respected fields.
>- Click on "Add" button.
>- Show a confirmation popup.

## Acceptance Criteria:
>- Users must be clearly shown the confirmation message.
>- User must be a librarian.
>- Errors should be displayed in the same popup for wrong data formats.

## Result:
>- Successful entry of a new book.