The internet changes everything. “Just as with continental drift, we know it’s happening, but we’re not sure where everything is going to end up. The case of the Deathly Hallows, though, demonstrates that there is one section of the media which is still resistant to the attentions of file-sharing. And it is books. If you really thought you saved yourself the cost of buying the book by downloading and printing it, you’ll find all you’ve done is shift the cost to yourself – and, probably in a few months, to the optician who’ll sell you new spectacles for your weary eyes.