Foldable reader?

An issue is of course that a nicely book-sized screen, say seven inches diagonal, is not really pocket-sized, especially not for pockets in women's clothing. So I am wondering: is it possible to today's technology, to make a device which will fold, and then open to reveal two screens so closely fit that for all  intents and purposes they appear as one? It does not have to be seamless, only "close enough" for most uses (say, when the line does not actually go across actual words, it's no bother).  That would be very useful.