Death wears many faces in New York City—and this time, John Keegan is staring straight into its eyes.

When the daughter of a renowned scientist is found strangled in Central Park, the whole city calls it a tragedy. When a ruthless drug dealer is slain in his apartment soon after, most call it justice served. Detective John Keegan is assigned the second case, and he’s not exactly shedding tears for the victim. Still, the law demands answers, and Keegan can’t ignore a deadly pattern emerging in the city’s shadows.

As more criminals turn up dead, it becomes clear a vigilante is on the loose—someone targeting an underground syndicate with a merciless hand. Privately, Keegan can’t help but admire the killer’s brand of justice. Publicly, he knows he has to stop them, even if it costs him dearly. With his occasional partner Rick Calhill struggling to overcome his own tragedies, and fresh losses striking at Keegan’s personal life, the detective finds himself pulled apart by duty, grief, and moral conflict.

Now, as the body count rises, Keegan must trust those he’d rather not and question everything he thought he knew. How does a homicide detective—desensitized by years of blood and violence—confront true, personal grief? And what happens when the killer’s next “adventure” is aimed right at Keegan’s heart?

Death Knell forces Keegan to grapple with vengeance, loss, and the true meaning of justice. In a city where every alleyway hides another secret and every murder could be seen as a twisted form of revenge, can Keegan survive both the hunt and his own unraveling sense of self? Experience the third installment in the John Keegan Mystery Series—where death isn’t just part of the job, it’s the catalyst that changes everything.