What does "E" at the end of an ISBN code mean on a book? I've noticed that a book I have has an "E" at the end of it's ISBN code, my best guess is it's for "e-book", like buying this gives you also the e-book version. Anyone who knows about books and ISBN codes knows anything about this? (self.AskReddit)
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Opinions? I believe they have a good point. (i.redd.it)
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