Thanks for your thoughts, TD. Yes, I am aware of the preferences tab with rules governing the addition of books to a library. It is helpful. In the past I've used it to filter duplicates with some success, after which I run the find duplicates plug-in, which will turn up additional match for each setting. If I find no better solution I will proceed that way again for this task.
However if the file names and database entries haven't been cleaned up there can be a heap of false positives and negatives. I wondered if pre-screening for supposedly unique items might let me make less of a mess of my target library once I add the books from the source, which isn't as consistently tidy with titles, authors, tags, and the like. Each library has about 3,000 items, so it will be a hassle to go through, but there may be no better way around it.
|