The Dry, Jane Harper.

WHO REALLY KILLED THE HADLER FAMILY?

It hasn't rained in Kiewarra for two years. Tensions in the farming community become unbearable when three members of the Hadler family are discovered shot to death on their property. Everyone assumes Luke Hadler committed suicide after slaughtering his wife and six-year-old son.

Federal Police investigator Aaron Falk returns to his hometown for the funerals and is unwillingly drawn into the investigation. As suspicion spreads through the town, Falk is forced to confront the community that rejected him twenty years earlier. Because Falk and his childhood friend Luke Hadler shared a secret, one which Luke's death threatens to unearth...