BUSINESS in the Nordic countries has suffered a series of humiliations in recent years. Nokia is a shadow of its former self. Volvo has been passed from one foreign owner (Ford) to another (the Zhejiang Geely Holding Group), and Saab Automobile has collapsed. Iceland’s banking industry has imploded. But in one business, at least, Scandinavia is sweeping all before it: the production of crime thrillers.