Calibre makes it trivially easy to switch between different Calibre libraries. I have 2 libraries, one for what's on the ereader and one that's for everything that's not on the ereader.
Whenever I finish a book on the ereader I delete it from the ereader, then when I next connect it to my computer I can see those that aren't on the ereader (in the "what's on the ereader" library) and can tell which ones I've finished since I sort by date. I then select them and use calibre's copy to library with delete after copy and copy (move) them to the library that has everything not on the ereader. Before I do that I tag them with "finished".
New books from the library or that I've bought go into the "what's on the ereader" library, from which I transfer them to the ereader.
What you're suggesting I'd find confusing because when you delete a book on the ereader calibre will say it's on the ereader.
I've downloaded thousands of books from project gutenberg and other places which I haven't read yet and they're in the everything that's not on the ereader library, so that "finished" tag keeps things organized.
Last edited by hobnail; 01-11-2020 at 08:38 PM.
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