I don't like how the cover of a book that i have finished is still used as a screensaver when using "Use last book's cover as screensaver"

I would like to have an option to change the screensaver setting depending on last book's status. In my case that would be something like if(last book's status == finished) "Use image as screensaver" else "Use last book's cover as screensaver".

For now, I've been switching between the two options manually.

I think the implementation could easily support all screensaver settings / scenarios.