I think @B0BIC is referring to selecting an actual notebook, rather than a single notebook.

I host my Joplin on my OneDrive and it would be awesome if somebody with developer skills that I certainly don't have could find a way to share a notebook with another person or place the same way that Joplin does it through their own cloud service just without having to use their cloud service.

I'm still very new to Joplin. I'm a long-term evernote user that is looking for an alternative to their rising prices.