My money is on books made of paper, or better, HEMP, like they were over a hundred years ago, going forward, because ultimately, there are too many factors which mitigate against the masses having either the internet (as we currently know it) or some similarly widespread technological device, that will allow the same functionality as we currently enjoy with the internet, in the future.  It all hinges on whether the psychopaths who currently control everything remain in control, or whether people wise up, and put them out of business.  Either way, intelligent people who ACTUALLY read books for the information they contain, in order to educate themselves (and not just to pass the time) will ALWAYS prefer to have an actual book to read.  Ultimately, the only thing that matters is this:  IF YOU like actual hold-in-your-hands books, rather than e-books, then you will likely always have this option available to you.  One thing is for certain - civilizations rise and fall largely based upon how educated the rank and file of those civilizations actually were.  America, under this metric, appears to be in trouble.  Still, if you prefer an actual book - you can always write your own - like an ongoing journal - from memory of all the things you've previously read, and committed to memory.