I must have added some library books from the Digital Editions folder without realizing it while back. Now they are expired, but I can't tell unless I try to view one. Calibre will let me send them to my reader and then they will show an error. Just scrolling through Calibre, they look fine.
I'd like to find all expired books (no idea how many) and delete them but I have a rather large library and didn't want to have to try to open each book. So, I wanted to know if there is a way to tell if a book is expired without trying to view it?