Into Thin Air

This is an Apple Books audiobook narrated by a digital voice based on a human narrator.
THE ONLY WITNESS 

When a child is abducted in front of Laney Kensington, she desperately tries to save the girl. But Laney is shot and left for dead; the kidnappers, their dark van and the girl long gone. FBI agent Grayson DeMarco explains she's the only witness to a worldwide child-trafficking ring. And if the kidnappers discover she's alive, they'll be back to finish the job. Yet Laney is determined to find the missing children. Even if it means returning to the search and rescue work she thought she'd left behind. And Grayson is just as determined to keep his sole witness protected. Especially when evidence hints that the real threat is closer than he ever imagined…