Since Spotify started offering US premium subscribers 15 hours of audiobook listening a month at no extra cost nearly a year ago, we know the company has been putting real money into the hands of publishers and authors, marking one of the few initiatives in our world from a big tech player that actually seems to have grown the market. (When Spotify launched a regular, a la carte audiobook sales program the year before, the impact was minor at best.) Digital audio had been growing a lovely 12 to 15 percent a year by industry statistics and through the first […]