It's not even related to the publisher, they're two different products that are separately licensed. Generally the publisher only retains some rights to the boo

It's not even related to the publisher, they're two different products that are separately licensed. Generally the publisher only retains some rights to the book and how they may use it and same goes for the audio book, with the difference that the recordings are owned by those that produced the recording and not the original writer (unless it's licensed as so).