Audiobooks being imported into main iTunes folder, not iTunes Media / Audiobooks
I've successfully moved our iTunes library onto an external drive, thanks to much help from people here. We can both now run off the external drive and access everything in the library.
In the process, I set iTunes to Keep iTunes Media folder organized, and Copy files to iTunes Media folder when adding to library. Everything looked great after that.
Then I started importing audiobooks, both from CDs and from other places on my laptop. They're imported as music, which has always happened. I just do a Get Info and change the kind to Audiobook and the title to the format I like (Title (publication year) author). I do that before importing if I can (this seems to be when I import from CDs), after importing if I can't do it before.
The books don't seem to be going into the iTunes Media / Audiobooks folder. iTunes is creating a new folder for each author in the main iTunes folder. Sometimes it creates a folder for each book by that author inside the author's folder; sometimes it just imports the chapters without putting them into a folder for the book.
What I've been doing is closing iTunes and moving those folders into iTunes Media / Audiobooks outside of iTunes. If no folder for the book was created, I create one and move the chapters into it.
I seem to be able to access that content in iTunes after I've moved it, but I don't know why it's putting this outside the Audiobooks folder, or why it sometimes creates a folder for the book but other times does not. I dislike dragging things around outside of iTunes because sooner or later that has got to cause problems.
MacBook Pro, macOS Sierra (10.12.6)