[emmgee]

LOL – "Simply"... In order to point the "Add books" feature to the correct folder on the Mac, the user has to figure this out first. That is not simple. By default it is a folder within the user library folder, something that Apple has make it difficult to access.

To make the folder easier to point to in Calibre trick is to change default folder in the Kindle app. That's what I did. But the user has to first imagine this is possible and then explore how to do it in the app's preferences panel. Once this is done, access to the folder is via the "Add books" feature is simple.

But the cryptic file naming convention makes things not so simple. If the number of new books is greater than 6 (that's how many azw files are displayed in the "Add books from a single directory" dialog), then it is really hard to figure out which file is new and which isn't. No, I don't think this approach is simple at all when the entire workflow is considered.

The best approach that I found is to use the third option in the "Add books" dropdown. You click on that (add multiple books from the same directory), click on "Open", wait for the read metadata/add books process to complete, then select "Select None". This way, duplicate books are not added – if you are lucky. Each time I have done this a couple of previously added books still show up and I have to delete them.

I think this is a very common use case: "Download new books from Mac (or Windows) Kindle app, add newly added books to Calibre". I would think this should a one-button operation within Calibre. That would be simple.