Nearly half of frequent audiobook listeners in the US are under 35, adding depth to the market now and into the future. And many of those listeners are using multiple sources of audio for their entertainment. Those who listen to both podcasts and audiobooks, listen to twice as many audiobooks.
In this article, how males appear to be driving sales:
https://www.thetimes.co.uk/article/men-drive-boom-in-audiobook-sales-89tl8vrpd