I copied some Garrison Keillor audiobooks to iTunes. I created the genre audiobook, and they went into my music. Curious, I checked the configuration to show audiobooks, and it was empty. I dragged them from music to the audiobook icon, but nothing happened. At my work there is another shared library - I opened it and didn't see audiobook - so maybe it isn't a category that can be shared - in which case I probably want to leave it mis-filed as music.