Be careful before you put down that iPad or Kindle and pick up an old-style "paper" book, Dave Winer writes. You might not be prepared for the experience. First of all, you have to move your head when you go from a left page to a right page. If there's a word you don't know, you might have to reach for another book to find out what it means, instead of just pressing your finger on the screen. And then this: "I keep looking for the clock. Paper books don't have them."
