John Corey narrates his own case files like a man who's decided sarcasm is cheaper than therapy, and that voice is the engine of Plum Island more than the plot ever is. Corey is a homicide detective on medical leave, shot on the job, sent out to the North Fork of Long Island to heal and stay out of trouble. He manages exactly one of those things. When a young couple turns up shot on their patio, both employed at the government research lab on Plum Island, the local police chief wants a real detective's eyes on it, and Corey can't help himself.
DeMille builds the case the way a good procedural should, in layers that keep shifting what kind of story you think you're reading. Is it about biological research gone wrong, given the lab's reputation and the island's rumors? Is it about old money and older land disputes, since one of the victims was chasing down a Mayflower-era treasure map? Corey works both threads at once, dragging a reluctant Suffolk County detective and a historian with her own agenda along with him, and DeMille is patient about letting the two investigations rub against each other before showing how they connect.
What sells this book isn't the mystery mechanics, which move at a comfortable, unhurried pace for a modern thriller. It's Corey himself: caustic, insubordinate, constantly picking fights with local law enforcement who outrank him on paper if not in instinct. He flirts, needles, and mostly gets away with it because he's usually right. Readers who want a stoic, humorless investigator should look elsewhere in the genre; Corey narrates his own incompetence and arrogance with equal relish, and the comic timing carries long stretches where the actual clues arrive slowly.
The Long Island setting does real work too. DeMille clearly knows the North Fork, the fishing towns, the vineyards edging out the potato farms, the old-money summer people looking down on the year-rounders, and that texture keeps the book grounded even when the plot ventures into buried-treasure territory that could tip into pulp in less confident hands. The history angle, colonial land grants and a fortune nobody's found in three centuries, gives the mystery a second gear once the biological-weapons red herring starts to thin out.
Why you should read
- Wisecracking, first-person detective narrators
- North Fork Long Island atmosphere and history
- Series openers with room to grow
- Slower-burn procedurals over breakneck pacing
What to expect
- Heavy first-person voice and dry humor
- Two intertwined investigative threads
- Strong regional detail and local color
- A patient build to a fair-play resolution
The resolution, when it lands, rewards the patience DeMille asks for. It's less a twist than a recontextualizing of everything Corey dismissed as noise along the way, and the book plays fair with its clues even while burying them under Corey's constant commentary. This is the first of a long-running series, and it shows its hand as an origin story: introducing not just a case but a voice DeMille clearly planned to keep writing. On its own terms, as a chunky, character-forward mystery with a strong sense of place, it delivers exactly what it promises.
