Harry Hole is in Norway this time, and when he gets "mysteriously" promoted to Inspector in another division, he's put on to a Neo-Nazi case that's going nowhere. But then his old partner is found beaten to a pulp, right after she rang him about something extremely important to do with a rare type of gun being illegally imported in to Norway and he's racing against time to try and find it-and its owner.
The Harry Hole books are great reads. They're fast-paced, wonderfully written (or translated) and keep your attention for hours. But they can be read straight through in a day and aren't specifically engaging, though I am early-on in the series so I'm sure Mr Nesbo got better with age and experience.