If you've really loved a book, or a movie for that matter, really loved it, what you want is that same book again, but as if you've never read it. And when you get something unfamiliar, you feel betrayed.
For my part, when I enter most intimately into what I call myself, I always stumble on some particular perception or other, of heat or cold, light or shade, love or hatred, pain or pleasure. I never can catch myself at any time without a perception, and never can observe anything but the perception.