The Search for Grandma Sparkle

This is an Apple Books audiobook narrated by a digital voice based on a human narrator.
When granddaughter Sarah learns that her grandmother Opal and niece Jessica are missing, she decides to search for her. When the car is found with two flat tires, Sarah and her boy friend from college, travel up and down the rural roads and creeks of southern Iowa to look for her missing relatives. Because of the storm that Saturday night, would they seek shelter in an abandoned barn, house or maybe even a coal mine whose opening has been uncovered? Were they abducted? Who would have a grudge against the gentle woman who only tried to help people through her church's SPARKLE Club?