As a side note, I’d like to state that I believe it is one’s right to own both a print book and its digital version(s) regardless of which one is bought. For example, I’d prefer (like some publishers are starting to do) to buy a print book & also get the digital version (epub, pdf, mobi, etc…) along it. Why should I pay another time for the same book? Also it is my right to own books & any digital content DRM-free!