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The third instalment in the highly praised 'Black Book' seriesFive unconnected teenage girls have been kidnapped, and Chicago PD detective Billy Harney is leading the investigation to find them.Harney and his partner Carla follow a lead to a remote house, but it's a deadly trap. A huge explosion rips through the building killing Carla and allowing the kidnapper to escape.The loss of his partner only serves to strengthen Harney's resolve to find her killer, and protect the teenage girls he targets.