Yes, and if
Amazon goes down, or your internet connection fails, oop, sorry, you're without your books. Cloud is nice, convenient, and great for everyday use, but God forbid that one incident shows up and makes it like you're back in 1999 or some other dark age.
That's an interesting response; it shows how much you understand.
Let me paint a scenario for you which might make things a bit easier. You purchase a book from
Amazon and your book purchase is registered with
Amazon (how else will they know you've purchased a book or even bill you.)
At the time of purchase "IF" you're using the Kindle app on one of the many devices it works on you get prompted for the device you want to have the book downloaded to. Yes, this is a digital copy, but you've purchased it.
The
Amazon network keeps track of that purchase. The network is a meshed network consisting of mutiple servers and a database spanning multiple physical locations. Let's say the network does go down... What network are we talking about. The one in your city or mine? Or maybe, it's the one in 2 cities over from where we are....
In any case, it shouldn't matter, because as soon as you get connection you gain access to one of the
Amazon servers and your data.
Carry that a step further, you want to read your book on your PC. Install the Kindle client and log into your account.
Amazon has a record of all the books you own. they're listed once you connect to their cloud. All that is needed is to select the book you want to "continue" to read and download it to the device.
Not only will it be downloaded, but you can pick-up where you left off on the other device. The cloud keeps the location in sync.
So, if you're concerned about backup it's already built into the Kindle services. There is no need to consider a DRM issue. You still have access to the book you paid for. You can archive it on the
Amazon service and retrieve it at anytime you want.