Each month Audible.com offers some FREE audio books.

All Audible Originals. Many are novellas.

I tried a few. One I listened through was Buried Deep by Margot Hunt (2 hrs and 38 mins).

After two decades in a near-perfect marriage, Maggie and James Cabot are enjoying their first year as empty-nesters in their charming Florida suburb, until two detectives arrive at their front door and change their lives forever.

The remains of a young woman have been found at a campsite in the Florida Keys. Hannah Nilsson, only 21 at the time of her disappearance, was last seen on a camping trip with a group of friends—including James, who dated Hannah long before he and Maggie ever met. …