Which do you prefer?
I've always preferred having a hard copy of a book, especially if it's illustrated. As swiping a screen isn't quite the same experience as leafing through pages to admire pictures.
However, I have recently downloaded the kindle app so that I can read something on my hand held device instead of lugging a 1000+ paged book around with me. I think it's revolutionised my reading habit, as I am now going through kindle book at a faster rate than I would if I was picking up a paper copy.