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Old 06-07-2011, 03:23 AM   #1
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Join Date: May 2011
Location: Scotland, UK
Device: Kindle 3
EXTH Header Question

I'm tried searching but with no luck and I was wondering if anyone knows what the EXTH - 3 - drm_ebookbase_book_id header is and what's it used for?

Obviously from the name it's something DRM related, but every book I have has a different number, is it kind of like a DRM ISBN or what?
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