The first book of the night watchman trilogy

Sydney's nights hide a predator. A brilliant detective, a
cunning killer, and a city on edge.
When the elusive "Night Watchman" begins his reign of
terror, Detective Mike Rogers is thrust into a battle of wits
against a man who blends seamlessly into ordinary life.
Charming family man by day, ruthless predator by night —
he stalks the streets, waiting for his perfect moment.
But as Mike closes in, the line between hunter and hunted
blurs. To catch him, Mike must risk everything — his career,
his sanity, and the woman he loves.
The Night Watchman is the gripping first instalment of the
Night Watch Trilogy — a relentless crime thriller of
obsession, betrayal, and the high price of justice.