I have Digital Editions installed and have authorized it. I also have down-loaded a book that I
want to transfer to my iTouch v4.1. When I plug it in, Digital Editions does not find it and I'm stopped
cold. iTunes finds the iTouch and I can see it from my Windows Explorer so I know I'm connected.
What now? I'm stuck and tried everything I can think of. I'm using Windows 7.
Found a good work-around. Go to iTunes, plug in your iTouch and to to APPS. Scroll down to your device
on bottom of the screen and click on "ADD". FInd the book you downloaded with ADE and select.
Many thanks to the following source:
This was a great help, and I would guess it might work for other devices as well.