[jayhjay]

I realized bits and pieces of my library are missing. Mostly it is covers - almost all the books are missing their cover preview (the one that shows up when you click on the book in Calibre, not in the actual ebook). When I go into the book file in Finder I see no image file for the books.

Also, a bunch of books say they have no available formats when I try to open them. There is nothing in their file location, just a cover in some cases, and a file that says metadata.opf. But the book itself seems to be gone. These seems to be confined to epub books but I didn't test every one to confirm.

I am guessing it is related to a recent move to a new library location (I moved the books to a dropbox folder). Presumably something got messed up along the way, although it could have predated that and I never noticed. I also downloaded some new calibre plug ins. Those are the only changes I can think recently.

Any suggestions for what might fix this? I know updating the covers is easy enough but before I go through and add them manually for all 250 books I thought there might be a simpler solution. And obviously I would rather not have to manually re-add all my books that are empty.

Any ideas what might have happened or how to fix it? Thanks!