On New Year’s Eve, partygoers at a secluded nature reserve north of Glommen discover a man’s body in an old stone quarry.

The victim is a quiet accountant from Varberg with no known enemies—only an obsessive interest in genealogy and secrets he was determined to protect. When threatening notes appear and firebombs explode, Detective Chief Inspector Kajsa Rudolfsson uncovers a trail of extortion leading to a criminal network beyond Sweden’s borders.

But someone will do anything to keep the past buried.

With her marriage fraying and pressure mounting, can Kajsa stop the killer before they strike closer to home?

Unknown Origins is the fourth installment in the Falkenberg Murders series, a tense thriller about buried secrets and ruthless crime.

On New Year’s Eve, partygoers at a secluded nature reserve north of Glommen discover a man’s body in an old stone quarry.

The victim is a quiet accountant from Varberg with no known enemies—only an obsessive interest in genealogy and secrets he was determined to protect. When threatening notes appear and firebombs explode, Detective Chief Inspector Kajsa Rudolfsson uncovers a trail of extortion leading to a criminal network beyond Sweden’s borders.

But someone will do anything to keep the past buried.

With her marriage fraying and pressure mounting, can Kajsa stop the killer before they strike closer to home?

Unknown Origins is the fourth installment in the Falkenberg Murders series, a tense thriller about buried secrets and ruthless crime.