By this point, Harry Hole has encountered every imaginable murderer, miscreant, and corrupt politician in his gritty but hyper-realistic fictional Oslo, which is why perhaps in the 11th volume Nesbo reaches for some ridiculous fads to keep Harry going. Enter tinder, which serves primarily as a "hey, I'm up with the new technologies" insertion into the plot, used as a convenient meet-cute between unsuspecting young women and... a vampire? How convenient that Oslo happens to also house the world's foremost expert on homicidal psychotic vampires, eager to help the investigation every step of the way. But lest this mystery unspool too easily, enter... a hurricane? In Norway.

Nesbo is a strong enough writer and Harry a compelling enough character that this one never fully jumps the shark, though it certainly makes for a weaker Harry Hole mystery thriller than usual.