The Exchange by John Grisham

The Exchange by John Grisham is a highly entertaining novel that picks up the lives of Mitch and Abby McDeere fifteen years after The Firm by Grisham. 

In The Exchange, Mitch is a partner in a New York law firm and goes to Libya on a case he's assigned. When an associate from the firm gets kidnapped, the novel then goes into the attempts to get her released, with the large role played by Mitch and Abby. It's a fast-paced read and very enjoyable.