The Reckoning

Ten years ago, Detective Mike Nolan helped lock away a sadistic killer. He thought the past was over. He was wrong. When a young man's mutilated body is discovered deep beneath Boston's Red Line, carved with the signature of a killer long believed gone, Nolan is thrust into a case that threatens to unravel everything he thought he knew. Teamed with Sarah O'Connor - a sharp, tech-savvy ex-Marine with a grudge of her own - Nolan must navigate a maze of buried secrets, surveillance conspiracies, and department betrayals.
As bodies pile up across MBTA territory and the killer begins a taunting campaign of psychological warfare, Nolan and O'Connor uncover the truth: the murders are not just personal. They're political. Tied to a covert DHS program known only as Project Harrow - and to choices Nolan made long ago. Framed. Hunted. Haunted by guilt. From Chinatown shootouts to subway tunnels rigged with traps, The Reckoning races toward a final confrontation beneath Boston's streets - where the sins of the past must finally be paid in blood.
Perfect for fans of Michael Connelly, Tana French, and Don Winslow.