[sourcejedi]

The smart move, of course, was made last year by bringing in Charlie Redmayne [...]

I spoke to Redmayne again to clarifiy this because it wasn't clear who was applyng that DRM, and on whose insistence. Redmayne explained that when a user chooses to download an e-book on their device, Pottermore sends that retailer a message to deliver the file to the chosen device (or in Google's case the cloud). The retailer then supplies the file through their own eco-system. DRM is applied because Pottermore never has access to the file to watermark it.

In Redmayne's words: "The file that goes onto the Kindle (or other device) is governed by the DRM of that device. But that is only because we have not been able to watermark it. The retailer applies whatever DRM system they operate. Going forward we'll look into this to see if we can do it differently."

-- 2012-03-28 / "Pottermore gets its wand on" / futurebook.net / Philip Jones.


Maybe the Kindle (/B&N/etc) watermark only identifies the book as being from the Kindle (etc) store. But that's just speculation, hence my question.

[Remembered to add - if you post a (partial) serial number for comparison, remember to say whether it's US or UK, as well as which book it is & where it came from.]