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Please pardon me if this is a dumb question but I find DRM technology confusing.
I know the Harry Potter books I own are watermarked for copyright protection. I was able to use Calibre to convert them from ePub to Kindle when I bought a Kindle K3 without disturbing the copy protection. Adobe DRM worked by downloading an ACSM file that acted as a loader; you opened the ACSM and it validated your ownership of that book and then downloaded the actual book, but if Kobo enables a "download" option they would have to download the actual book. Apparently Kobo has some concern about preserving copy protection if they download the book file with just their in-house DRM.
So I was wondering if it's possible for Calibre to convert a kePub book to a ePub book the way it converted a Sony copy of Harry Potter to a Kindle version? Apparently the Tor books don't have DRM so if Calibre can convert to an earlier version of ePub, then would it work to solve the problem?
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