5

They are actually two different questions :-) In Europe, for example, sales are affected by the fact that (paper) books have a very low VAT on them (in Italy it's at 4%) while ebooks are taxed like most goods (in Italy it's 22%), so it may even happen that an ebook is more expensive than a book. As for readability, my impression is that it heavily depends ...


3

Note that companies controlling both the devices/apps and the store (e.g., Amazon or Kobo) perform analytics routinely, exactly because they can gather info from the reading system (app or device firmware). They even share their findings with the publishers (to make them "optimize" their eBooks, so that they can sell more) EDIT: see "/data lessons/", ...


2

Forewords I am assuming that the poster of the question calls "unrestricted books" the books that have no DRM, i.e., no technical devices intended tp prevent some uses, such as copy, search, or adaptation to new reading devices. All books are born legally restricted by copyright, at least today, until they enter the public domain. Very few rightsholders ...


1

Publishers have been very slow to push the boundaries of interactive ebooks, outside of education and children's books. One exception is a French language version of H.P. Lovecraft's "Kadath", published by the publisher Mnémos, with Walrus Studio. That seems to have been almost an experiment on their part. ( https://vimeo.com/43381264 ) I've developed ...


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