Libraries where I live offer books on .mp3 on a CD disk.
I love listening to audio books when I travel. I am loading up now for my next trip (Mexico & Central America). Three books ready for upload to my mp3 player:
Ripping books from CD, in comparison, was slow & painful. Death to the audio CD.
Use the IMPORT function on your iTunes (or other inferior) music software to get the track order sorted correctly.