I've authorized my computer and my nook. I'm able to download the book from my library and it shows up in ADE.My nook is plugged in. When I drag it to my nook, it shows up on ADE under my nook, however on my actual device it does not. I've tried uninstalling and re-installing ade on my computer.
What else can I do?
Have you tried this thread: http://forums.adobe.com/message/2977746
I've noticed, even for people who try and try again as you have, that sometimes it's just a little thing they've overlooked! Hope it helps.