The preference for a more advanced technology against to the eternal classic. Kindles are expensive, but cheap books to download and it depends on the capacity to save the books of your taste. With paper you don't need to recharge it, you can write on it, open it with your hands instead of a button, but it can get old with time and easily break apart and attracts a lot of dust.
So... Which you'll choose? Kindles or paperbacks / hardcovers?
So... Which you'll choose? Kindles or paperbacks / hardcovers?