[BetterRed]

My take is that the data, i.e the library, belongs to me, calibre is a tool I use to organise, manipulate and access that data… but not exclusively.

So, why would I copy the file path to that EPUB in my earlier post and not copy the calibre view-book link to the EPUB?

If I put the calibre view-book link into another application, then when I click on that link the calibre Viewer will open the EPUB, and the calibre library manager will start or switch to the Default library.

If I put the file path link into another application, then when I click on that link the calibre Viewer will open the EPUB… end of story. The calibre library manager would not be started, and if it was running it would NOT switch to the Default library.

BR