I use syncthing to sync my library around now, as mentioned in the article (I believe). This works great for Koreader, which stores read stats in a plain text file next to the ebook file. That can lead to syncthing conflicts sometimes, unfortunately but I suspect that might be more because of my combined use of git-annex and syncthing to archive my collection than anything specific to syncthing.
It does mean I need to use koreader everywhere though, I don't have a way to sync read progress back into Calibre, but then I don't really have read progress there anyways. I have a "read/not read" flag there, but it's some custom thing I added somehow, Calibre doesn't support that out of the box anyway.
It does mean I need to use koreader everywhere though, I don't have a way to sync read progress back into Calibre, but then I don't really have read progress there anyways. I have a "read/not read" flag there, but it's some custom thing I added somehow, Calibre doesn't support that out of the box anyway.