...
Kindle does it like this:
- No progress info when user is reading (so as not to clutter the space)
- User taps the preview mode to see:
- scrollable page thumbnails with page number at the bottom of each
- an overall progress bar with markings for:
- book marks
- current location: i.e. "Loc 937 of 4956
- percent of book completed: i.e "18%"
...