Ghosts of Days Gone By (John Keegan Mystery Series Book 10)

What happens when a detective's past doesn't just haunt him—it hunts him?

In Ghosts of Days Gone By, NYPD Homicide Detective John Keegan finds himself at the crossroads of his unraveling marriage and unresolved past, as an eerie murder in Central Park echoes a case from nearly two decades ago.

When Alice Duncan is found shot after a concert, Keegan is thrust back into a chillingly familiar scenario—a young woman slain under mysterious circumstances with signs pointing toward dangerous criminal forces. As he digs deeper, Keegan confronts his past mistakes, facing shadows he thought he'd left behind.

Complicating matters, Keegan’s estranged wife, Pauline, has taken leave from their life together, casting uncertainty over their future. To add fuel to the fire, Elena Moreno, Keegan’s former flame and a savvy reporter, resurfaces in New York to cover his growing celebrity from a hit TV series based on his career. Torn between his unresolved feelings for Pauline and distractions from Elena, Keegan struggles to keep his personal life from unraveling further.

After his explosive takedown of former mayor Noreen McHale exposed deep-rooted corruption, Keegan finds himself branded "Keegan the Destroyer," becoming the target of mounting resentment from city officials and media alike. Guided by the steadfast Detective Arianna Nunez and his long-time friend and mentor Karl Lavin, Keegan dives into the investigation only to discover the sinister link that ties this murder to an intricate web of gang warfare and political corruption. The deeper he goes, the more dangerous the game becomes, pulling Keegan into the sights of powerful criminal factions and city politicians who’d love nothing more than to see him fall.

With tension ratcheting higher and his personal demons closing in, Keegan must untangle the web of deceit, violence, and power before more innocents are caught in the crossfire. But when the truth finally emerges, the devastating revelation will force Keegan to make a choice—one that could shatter his life beyond repair.

Rich with gripping suspense, emotional depth, and explosive twists, Ghosts of Days Gone By is an electrifying thriller that explores the dark underbelly of New York City and the haunting repercussions of past decisions. And in a unique twist, Ghosts has a companion novel, To The Bone, where Pauline shows her side of the events while investigating a missing persons case in Maryland. Both books will converge in The Takedown, the final John Keegan Mystery, set for publication in early 2026.

Fans of complex mysteries, intense police procedurals, and character-driven thrillers by Michael Connelly, Harlan Coben, and Dennis Lehane will be captivated by this riveting installment of the John Keegan Mystery Series.