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Old 10-21-2011, 11:31 PM   #17
Jane12
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Posts: 171
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Join Date: Oct 2010
Device: iDevices
Quote:
Originally Posted by HarryT View Post
... Buy an ePub book from iBooks and a Nook won't read it; buy one from B&N and a Kobo won't read it. There are at present three different, mutually-incompatible ePub DRM mechanisms in use.
They're not entirely mutually-incompatible. B&N's Nook will read both Adobe DRM as well as their own B&N DRM (which is actually a version of Adobe DRM). So you can buy books from Kobo, Sony, etc. and read them on the Nook, but not vice versa.

Basically, this is my understanding:

Adobe DRM: Offered by basically every ePub seller *except* B&N and Apple, and which can be read by most ePub readers, including Kobo, Sony, B&N Nook. (Actually, I can't think of a single ePub reader that won't read Adobe DRM, unless you count apps like iBooks or Stanza.)

B&N-flavored Adobe DRM: Offered only by B&N, and which can be read on Nook and a handful of other readers that take full advantage of the latest Adobe software

Apple DRM: Offered only by Apple and readable only on iBooks
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