[Statch]

I used to use Calibre on a laptop. A couple of years ago, I switched back to using a desktop, but left Calibre on the laptop. I've been adding books to the Calibre library on the desktop. I just recently realized that somehow when I moved my books to the desktop, I didn't transfer most of my old MS Reader books (and I had a lot). So the Calibre library on the laptop has the MS Reader books, but the Calibre library on the desktop has all the books I've bought in the last two years (with ratings, etc). Both libraries have a subset of books that are the same on each device.

Is there any way I can merge the two on my desktop, and keep the items that are the same in both libraries while adding the books that the laptop has that the desktop doesn't have? I tried doing it by copying an author directory from the laptop to the desktop, hoping that it would only copy over the new files and ask me whether I wanted to overwrite any existing files (so I could say no), but it just created a duplicate copy of the directory.

I'll do this book by book if I have to, but it would be really nice if there was a more efficient way I could do it.