ipod classic fault

There are a couple of factors to consider:

1. 1. if you are looking in Audiobooks on the iPod, but cannot find them, that suggests that the media kind of the books is not set to Audiobooks. (No, setting the genre to Audiobooks will not cause the files to become "Audiobooks")
   2. are the tracks listed in your iTunes Library under the Music library, or the Audiobooks library? Just below iTunes' top bar menu is an option to switch between your Music library and the Audiobooks library:

and

(in the screenshot above, Music is currently selected)

To recap, if the tracks are listed in your Library under Music, but you look on the iPod under Audiobooks, you will not see them.

There are advantages to having Audiobooks set as media kind is Audiobook, (such as Remember playback position and Skip when shuffling are automatically set to "on", saving you the job of setting those options), so you may feel that it is worth the effort of changing the tracks to audiobook.

To change the media kind from Music to Audiobook:

• • to be an audiobook, the media kind of each track has to set to Audiobook. The option to set the media kind is found by right-clicking the track and from the context menu, choose Audiobook Info (which already tells you that the media kind is Audiobook) or Song Info (which tells us that the track is media kind is Music); on the panel that opens up once you select whichever option appears, switch to the Options tab. So that's:
    • right-click/Song Info/Options>media kind or
    • right-click/Audiobook Info/Options>media kind:

Once you make these changes, you will need to Sync the iPod with your iTunes Library in order for the changes to take effect on the iPod.

Note that if you use Manually Manage for the iPod, you will have to remove the old tracks from your iPod and then copy the revised versions onto it.