[GregTheGrate]

Had a bit of a disaster with my library and when restoring, some of the books show in the list, but have no content. I have "quite a few" books and going through my library one-by-one is going to take a long time.

Is there a query that will identify empty books folders. I have multiple backups and can restore individual books if I can identify them.

Have tried not formats:"=epub" and not formats:"=pdf" and not formats:"=azw3"
but got nothing back.

I should add that although the formats are missing from the book folder, they show as there in the browser. The only way I have found of identifying them is the cover is missing

Help