Each one will have its advantages and drawbacks, so there is no need for a single-size audio book. Instead, consider your larger business goals, so you can decide the ways to turn a book into an audiobook that suits best for you.
If you hire a producer, it will do everything possible to say and produce the audio book. Although it saves you the most time, you will also have the biggest expense.
The royalty share is where a narrator creates an audio book without any payment in advance. It will however take 50% of all sales and you will have an exclusive seven-year deal with ACX.
You would not be able to use your audio book as an invitation to register for an email list or as a bonus. And if you are making a lot of money from audio book sales, it could probably cost more in the long run than hiring an open storyteller.
My personal favorite method for development of audio books is the do-it-yourself approach. It saves many writers hundreds and thousands of dollars, and you can create a book in a matter of hours for a shorter book.
Perhaps the main reason for creating an audiobook from a book by yourself, particularly for non-fiction writers, is to develop a deeper link with the listeners.
What if I try to record myself and do not know if people want to hear me?
Firstly, it is important to remember that many people are somehow self-conscious about their voice when recording only because it does not sound the way they listen to it. Others would want to hear you say a novel. The best way to react though is to record a sample and get feedback.