Even today, by the term book, we mainly understand printed books on paper. Yes, ebooks in digital format is making in roads and is getting more and more in circulation but still, most people do not have that much good idea about it. So, there is some mistrust.
I like ebooks more than printed books because first of all they are much cheaper. Secondly, they are always available in your PC or internet. Others cannot steal them. You cannot think of any free book but in Internet there are many ebooks free of charge. In fact, most of the English classic books are free to download from some websites. When I was a university student, 10-15 years ago, we used to buy Penguin classics and now, I can find all of them free online.