Hola to All!
Perhaps I have missed it, but I am looking for a plugin (or other?) that will me to compare the current/active library of books against an "external" list of books.
The reason is of course to eliminate duplicates. My collection is simply too large (80K titles) to keep within Calibre and is maintained on the web. Calibre is of course used for cleaning up titles, authors, conversion, editing, adding covers, metadata, etc., but are not saved locally.
I do maintain a separate spreadsheet of all titles, but using it to compare against new entries is cumbersome, to say the least!
I would like to have an external CSV file (or plain text, or whatever) with all my current tittles that Calibre can check against once I have cleaned up a new set of titles in the active library.