I couldn't go back. I tried. I have about 2 dozen books I haven't read. I am hoping they come out for the Kindle, because while I've tried, I have conceded that I will only read Kindle books from now on. The hard back books are too heavy and cumbersome. The paperback are too filthy with ink getting on my hands and I constantly lose my place when I fall asleep while reading (which I do every night). I fall asleep, drop the book, and completely lose my place. Since I do this every night, it is not an isolated occurrence. When I do this with the Kindle, the Kindle just goes to sleep. When I wake it up it is either on the correct page, or, if it accidentally hits the new page button while it slipped down, it might be a page or two off, but still easy to find my place. No going back for me.