OK if nobody with more recent ADE experience is available, I might be able to help
track down the problem.
First, have there been any major changes to your system or your install of ADE, since
when you were last able to download and read library books?
Can you read the library books in ADE on your PC?
When in ADE on your PC, do you have your ALP listed and can you select that entry and
have it show the books ADE is managing for your device?
The copy of the ebook in your "My Digital Editions" folder on your PC contains the file as
it is downloaded from the internet.
The ADE program on your PC must be "Authorized" before it can "Authorize" devices. (It
may be that something has occurred that changed or removed that "Authorization".)
All the "Authorizations" must have been made based on the same "AdobeID" and the
ebook purchase must also have that same "AdobeID" referenced somehow.
Luck;
Ken
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