He is watching. Waiting. Has he come for revenge? Outside a quiet bush school, an old man sits in a parked car, eyes fixed on the children. One of them is Roberta Becker, daughter of Harry Becker. Is the old man going to snatch her? Years ago Anastacia Babchuk, known as Chook, killed his son. Now Chook believes he has returned, and he wants Harry to suffer. Or, is this man the elusive Fat Man, the shadowy figure who has haunted their lives? Or merely a phantom born from fear and guilt? Chook will not take chances. She travels to Melbourne, determined to uncover the truth.

What she finds will change everything. She pulls the trigger. But did she stop a monster? Or unleash something far worse? Serious Business is the explosive fourth instalment in the gripping Harry Becker Mystery series. Gordon Reid delivers a relentless tale of obsession, vengeance and the terrifying cost of justice.