You have to still use USB and iTunes to do this or pretend your book is music. Apparently, if you have a set of MP3s that are book from outside of Apple, then here are your choices if you don’t want to have this problem:
- Remark the type from
AudiobooktoMusicwhich messes up your music. This will work as long as the bit rate is above 96kbps which most books are not. - You can now use the iCloud document storage, so stick the files into the files area on your Mac and they will appear in the Files application. There is a primitive audio player in the Files thing that handles this, but it only does one MP3 at a time and you have to set the audio output in the Music application as it doesn’t have that icon. Very clunky
