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Originally Posted by nowthenmobile
So, if you reckon that I cannot convert Kindle to Nook, then if Amazon were to stop providing support for Kindle and stop selling Kindle, I could end up losing my entire ebook collection?
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Without DRM it is very easy to convert(shift) book formats from one to another.
There are many other reasons where you can lose access to your books, that are even more likely than you given scenario.
Some are an author or publisher chooses to pull a book. You lose access to your account, Amazon revoked it, you got hacked, etc... DRM scheme changes. Disputes between publishers and retailers.
In all of the examples I listed, save losing access to accounts, I've lost access to my books. The process of liberating a book is really the only guarantee you will have access to you books in the future.
Quote:
Originally Posted by nowthenmobile
Are modern EPUB books all DRM protected? What does the DRM do? Does it tie an EPUB to a particular brand of eReader? If I bought it for a Nook, could I then transfer it to a Sony?
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You just asked a very simple question that is going to generate a confusing answer.
DRM=Digital Rights Management.
What this does is encrypts a book so only devices with compatible DRM can read them.
Right now ePUB has 3 different DRM schemes on them, and can have more. Currently the vendors are Adobe, Nook, Apple). Adobe is the most supported at this time. Nook reads Adobe ePUB.
Kindle only has 1
The best way to think of formats is Format+DRM. Remove the DRM and life is easy.
Also in regards to nook lending. Don't think of it as (ePUB lending) since nook supports two formats PDB and ePUB. You can lend nook books but only to another nook device.