Say You're Sorry — Michael Robotham

TWO MISSING GIRLS. TWO BRUTAL MURDERS. ALL CONNECTED TO ONE FARM HOUSE. WHO IS TO BLAME?

When pretty and popular teenagers Piper Hadley and Tash McBain disappear one Sunday morning, the investigation captivates a nation but the girls are never found.

Three years later, during the worst blizzard in a century, a husband and wife are brutally killed in the farmhouse where Tash McBain once lived. A suspect is in custody, a troubled young man who can hear voices and claims that he saw a girl that night being chased by a snowman.

Convinced that Piper or Tash might still be alive, clinical psychologist Joe O'Loughlin and ex-cop Vincent Ruiz, persuade the police to re-open the investigation. But they are racing against time to save the girls from someone with an evil, calculating and twisted mind...