Nick Gunn finally has momentum. His agency thriving, his team sharp, and the little boy who calls him Dada-Gunn anchoring his world. But stability shatters in a heartbeat, and Scotland Yard summons him across the Atlantic. Monica Hart, the brilliant, seductive killer who once slipped through his grasp, has resurfaced in London with murders staged like puzzles and messages aimed directly at him. Nick enters a city of fog, secrets, and escalating body counts, where every clue feels personal and every move pulls him deeper into Monica's obsession. But while he hunts her, danger erupts back home, threatening the people he loves most and exposing the lies he's kept buried.

You can outrun a killer.

You can't outrun yourself.

Smoking Gun is a razor-edged noir thriller, gritty, cinematic, and pulsing with heart, where loyalty is a weapon, love is a liability, and the past never stays dead.