Kindle Paperwhite - Books show as Documents
Hello, I've had my new Paperwhite for a few days now and I am loving it! The display is amazing and I don't have any of the problems mentioned here.
Anyway, I've put some of my books in my Paperwhite using Calibre and some of the books show as Documents and not as Books. I have seen a few mentions of this problem here, but never a solution. Has anyone figured it out? Does it need a special tag in Calibre or something?