I am unable to download an audio book that I bought from iTunes to my iPhone 5 I am unable to download an audio book that I bought from iTunes to my iPhone 5. It appears on my phone only in the shared folder when I'm connected to iTunes. When I exit iTunes the book disappears.
I think audiobooks get somehow special treatment, so that can not be re-downloaded them (even if accidentally deleted).
You have to copy it from iTunes over to your iPhone.