The third mystery in the hugely compelling, bestselling international crime series from Norway's answer to Agatha Christie, Hans Olav Lahlum. The Catalyst Killing will have you guessing to the final clue...

The first murder was only the spark . . .
1970. Inspector Kolbjørn Kristiansen, known as K2, witnesses a young woman desperately trying to board a train only to have the doors close before her face. The next time he sees her, she is dead . . .

As K2 investigates, with the help of his precocious young assistant Patricia, he discovers that the story behind Marie Morgenstierne's murder really began two years ago, when a group of politically active young people set out on a walking tour in the mountains. There, one night, the party's charismatic leader - and Marie's boyfriend - Falko Reinhardt vanished without a trace.

But were the relationships between this group of friends and comrades all they appeared to be? What did Marie see, that made her run for her life that day? And could both mysteries be linked to Falko's research into a cell of Norwegian Nazis he suspected may still be active?

It soon becomes clear that Marie's death is not only a complex case in its own right, but will act as a catalyst in a dark set of events which will leave K2 and Patricia confronting their most dangerous and explosive investigation yet. And as the pair work hard to unravel the clues before Marie's killer can strike again, the detective fails to notice that his young assistant has her own problems to face . . .

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