There are very few books I'm willing to buy in paper now. In a few cases, where there are no ebook versions available, I'll buy or plan to buy a used edition as the price drops, to cover an electronic copy obtained "elsewhere." But I have extremely limited shelf space, so only my very favorites go on the shelves. (They go on the iLiad, as well.) Everything else is ebooks only, often with the paper originals in boxes in the basement. This summer I hope to finish inventorying the basement boxes so I can verify my ebook replacement project status.