How does the K3 identify books?
I've got a load of books from Amazon, and stripped the DRM as I want the copy on my Kindle to be the .mobi version. That way I can back it up, and restore more easily. Most of the books are fine, but there are a few that show in my Archive, even though the mobi copy is already on the K3. What's the attribute I need to check to make the Kindle recognize the books on there, as books I already have?
Thanks for any help.