4 ideas
Oslo detective Harry Hole investigates the illegal purchase of a Märklin sniper rifle and traces it to Norwegian volunteers who fought for Germany on the Eastern Front near Leningrad. A present-day crime can only be solved by reopening a past the country had agreed to leave closed.
After the war, Norway prosecuted its front-line volunteers as traitors. Many businesspeople and officials who had collaborated more profitably went quietly back into respectable life. A shared story of united resistance let society scapegoat the visible foot soldiers of collaboration while protecting its elites, and the resentment this produced stayed unresolved for decades.
The killer's wartime trauma has broken his identity. He partly lives as his dead, charismatic comrade, Daniel Gudeson, and acts through him. Taking on the dead friend's persona lets him carry out violence and loyalty the original self could not own, which is why his killings look like the work of someone who no longer exists.
After Harry mistakenly shoots an American Secret Service agent, his superiors give him a promotion to the security police instead of discipline. The promotion moves him away from real cases and out of view. The book invites reading institutional reward as a possible tool of containment: watch where a person gets moved and what they can no longer see, not the title they receive.