How do I move an audiobook on my ipod nano from music to audiobooks?

[iMore Question]

I put an audiobook on my ipod nano but it is in music rather than audiobooks. How do I move it?

 

[SwitchBeach]

You can't. If is it the correct proprietary file format, it will go to the correct place. It it was ripped from CDs or is MP3 (or some other format), it will not be displayed under Audiobooks.

What format is the audiobook? From where was it purchased?