that is great thanks.
it seems that many books which I did not originally get from the library are now available at the library, I think my library's collection has grown a lot in the last year or so
my next puzzle: I complete this one off match my entire library + create my new column...
in , say, a month's time , I'd like to check whether the library has any new books which now also match my collection, so I can use this new column: select only the unmatched books, then have the plug in run against "selected books" to re-check for those ?
is it safe to just re-run the entire check or will I get duplicate IDs being created for already-matched books ?
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