Is your feature request related to a problem? Please describe.
As the library is open 24/7, people also would like to borrow outside the opening hours. A self-checkout station would allow people to register themselves their loans in the library before leaving with the books.

Describe the solution you'd like
Examples of devices:
https://www.bibliotheca.com/solutions/self-service-checkout/
https://d-techinternational.com/products/self-service-2/
but will require an integration with the Library catalogue.

Describe alternatives you've considered
Using a standard PC and barcode reader.