Add-ons can double the current 15-hour monthly listening limits, for a price.

Spotify’s executives see an even bigger opportunity, they said. Despite the recent growth, they said, audiobooks represent less than a 7 percent share of the wider book market.

Spotify’s Audiobooks Push: Wall Street Dissects How It Differs From Its Podcast Initiative An Evercore ISI analyst expects the effort to be a higher margin business than its music offerings ...