I used to work at Amazon in the physical audiobook publishing world. For physical audiobooks, most of the NYC publishers priced their audiobooks based on the n

I used to work at Amazon in the physical audiobook publishing world. For physical audiobooks, most of the NYC publishers priced their audiobooks based on the number of CD's the book would go on. Longer books required more recording and more CD's in a box and would be priced higher. They sold, but not that well because the relative pricing was high. You could see physical audiobook sales crater once a book moved from hardcover to paperback. I did the data analytics and was able to determine the pricing formulas that audiobook publishers were using.