I tried to listen to the expanse audio book but could not get into it due to the narator doing all the voices. He was good but it was not working for me. Also a lot of "he said" in dialogues. Which made me realize that if they would make it into something like radio plays used to be, i think that is easily a billion dollar untapped market. Add environment sounds, folley, multiple actors and there is a lot ofmoney to be made.