Two books with the same internal identifier
I have two books. When I try to add one to the Reader software, it overwrites the other.
Careful examination of the content.opf for each book shows that the dc:identifier tag is the same for both books.
I could probably just change one at random and get it to work, but is there anywhere to go to find out which book has the wrong id, and what the right one is for that book?
The publisher is listed as Penguin Group.
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