Books have been around for a while now. Love them but it takes a lot of resources to make a book: trees, a plup mill, a printing press, a way to ship them to your door or nearby store.
In SciFi stories, people aren’t reading using parts of dead trees. They’re using some cool holo-something or thin e-paper thingy. Now days, we can read books with devices similar to scifi characters, and the devices are improving every generation. Two I’d like to talk about are the Kindle and Calibre.