Forget needing a driving beat to run. Hannah Ubl is listening to audiobooks while training for her first half-marathon.
"The quality and production values for audiobooks have gotten so much better," she said. "It's easy to get swept away."
On recent runs, she's alternated between listening to her favorite Harry Potter novel and "Sapiens: A Brief History of Humankind," a nonfiction bestseller about evolution.
"I like the escapism, but I need the learning," said Ubl, 28, research director for the generational consulting firm Bridgeworks. "I feel like I'm wasting time when there's any moment of my day when I'm not learning."
Anyone with a smartphone has an audio player in their pocket. With just a few clicks to an online publisher or subscription service, you can be listening to a blockbuster mystery, a spy novel or a biography while you drive to work, walk the dog, wash the dishes or fold the laundry.
Having a storyteller at your fingertips is proving to be a strong lure.
While sales of print and e-books are flat or declining, downloads of audiobooks are soaring. According to the Audio Publishers Association, digital downloads jumped by 34 percent in 2015. The number of audiobooks published in 2015 stood at 35,574, more than four times the number of audiobook titles published just five years earlier.
And listening is only getting easier.