Is it real?

I read a little article a while back saying something about the reading experience being significantly different with a real book versus a tablet, and while I agree, for most of the penniless author-wanna-bes of the world, I think the ebook revolution surely beats the vanity presses any which way you look at it.  Mostly it has saved us all from becoming like an older gentleman I know, he's published a dozen books at his own expense and spends his life hawking them to unwary strangers (all the locals avert their eyes and speed walk in the other direction lest they be forced to spend another $20 to politely escape the situation!); sort of like when your niece is selling Girl Scout cookies except she's been doing it for 40 years.  But I've sometimes wondered if those books are 'real.'  If we suddenly entered a technological dark age, would there be anything left of our digital work?  But then the paper versions can be just as fickle, indeed, when the world burns, as it one day will regardless of your theology (on this the naturalist and the theologian agree) it will go up in smoke and all come to naught.  I guess there's only one Book worth considering as Real, one that will survive any impending apocalypse: Et verbum Dei manet in aeternum!