This is a real killer!  Nesbo jerks the readers chain back and forth so many times that I lost track about how often I was disoriented, depressed, upset, and misled.  The basic story is that Hole is dragooned back into a special squad consisting of several of his/our old friends from prior novels in order to catch the Cop Killer, a viciously violent murderer who kills policemen at the site and on the anniversary of a previously unsolved murder.   The novel begins and ends with what is apparently Hole’s funeral, but the former turns out to be the death of a drug dealer and the latter turns out to be Hole’s wedding.  In the meantime, the joy of the latter ceremony is totally destroyed by the final paragraph of the novel, a certainty that Aule’s young daughter will be the next victim.  Nesbo’s willingness to kill off his most loved characters, in this case, Beate Linn, is very unusual for a serial novelist.  These books disturb and fascinate and avoiding them is as impossible as avoiding heroin or the ‘deviation of your choice.’  Can’t wait for the next one!