While listening to an audio book on my i-touch which I had originally begun listening to on my 5th gen ipod, the narration suddenly and unexpectedly stopped. When I attempted to restart it the audible introduction played and then it stopped again and went back to the title screen. Some detective work and I found that either itunes or the i-touch breaks the audible downloads into somewhat random chapters, not to be confused by with chapters within the book itself. The list of chapters is accessible using the control near the upper right of the screen used to view the list of audio tracks. In my case I had to manually touch advance to the next chapter because it had stopped at the end of the previous chapter. Since that occurence I have had audiobooks stop randomly a few more times but I was able to restart them normally with the play control.