The Redbreast by Jo Nesbø
Harry Hole
is back in Norway and in charge of making sure the visiting U.S. President is
not assassinated. A tollbooth that should have been emptied has a man
standing in it holding a machine gun. Harry tells his partner to call
their liaison with the Secret Service and if it's one of theirs to blow the
horn. He races towards the tollbooth and as the President's motorcade
tops the rise where the man has a clear shot, Harry shoots him. Then the
car horn blows.
Harry
followed protocol and the Norwegian government does not want to say it's their
fault. Everyone agrees that the only solution is to treat Harry like he
was being heroic and give him a promotion. When they extract him from his
retreat into drunkenness, he understands what's up. They transfer him
upstairs into his new job as an inspector. He notices that there was an
illegal gun sent into the country and he worries that since it is only used by
assassins that there is murder that will happen. His new job has him
investigating neo-nazis and he discovers a connection. The story takes
place in two timelines, one during world war ii. The purpose of the
timeline is both a red herring and an explanation of the murderer and the woman
Harry falls in love with.