pffft. Everyone knows that bottle caps are the preferred currency of 9 out of 10 post-apocalyptic societies.
I really like my tablet/e-reader. It is very convenient to have dozens to hundreds of books at hand at any given moment. Especially as a gamer, it's nice to be able to carry my library with me when I don't know which game I may be playing any given day, instead of carrying around a second crate of books. But I'll never give up real paper books either. There is a primal joy and sensation of holding a real book in your hands that an e-reader just doesn't satisfy. And you don't have to recharge your books...