While we're on the topic of libraries, I noticed in a recent update that Calibre supports multiple libraries.
Even better, that included the ability to move libraries to elsewhere on the computer. So I had the bright idea of doing a little housekeeping by putting all three of my Calibre libraries into the same folder. Somehow, housekeeping never turns out as well as one might hope.
My problem is that I told Calibre to move my main library and pointed to the folder where I wanted it to go. Calibre appeared to accept the idea of moving my library, claimed to be moving the library, and was left alone until it finished. Alas, when it finished, I noticed in Calibre that I was missing lots of covers and some records that used to have book files and comments are now empty. What was left behind in the old library seems pretty random. In a few cases the folder, comments, and book were all left behind. In other cases an empty folder is all that's left. When I navigate to where Calibre used to be, I find 15 authors with 112 files in 84 folders. Some of these folders are empty. Others have a .jpg +/- book files. In a few cases, some formats of an ebook moved to the new location while other versions of the same ebook were left behind. Comparing with Calibre, some of the folders that still contain book files did move to the new location. Did I go wrong someplace along the way? Was my library too big (used to be 921 books, now 906)? I moved the two smaller libraries first, but they appeared to move without problem. I suspect that I just need to spend Saturday going through and cleaning up, but would cheerfully accept suggestions on how to make that easier.