So when Lou crosses paths with Diana Dennard—a relentless huntress tracking a child predator—she doesn’t interfere. Lou recognizes the fire driving Diana forward. The obsession. The certainty that killing evil is the only way to survive it.
But Diana’s hunt isn’t about justice.
As Lou is drawn deeper into Diana’s world, the lines between predator and protector begin to blur. Diana’s methods grow more erratic. Her targets expand. And suddenly, Lou realizes the danger isn’t just to criminals—it’s to the people Lou loves most.
Forced into a deadly game of manipulation and control, Lou must confront a terrifying truth:
What if the greatest threat isn’t the monsters she hunts—but the one who knows exactly how she thinks?
Devil’s Luck is a dark, psychologically charged vigilante thriller about obsession, moral collapse, and the thin line between retribution and madness. Brutal, emotional, and unflinching, this installment pushes Lou closer than ever to the edge—and asks whether some paths of revenge can ever lead back.
USA TODAY bestselling author Kory M. Shrum has published more than thirty books, including the bestselling Shadows in the Water series.
She hosts two podcasts—Who Killed My Mother?, a true-crime podcast about her mother’s tragic death, and A Well Cared For Human, focused on practical strategies for wellbeing and personal transformation.
She also publishes poetry under the name K.B. Marie.
When not writing, speaking, or pursuing one of her 300 hobbies, she can usually be found under thick blankets with snacks. The kettle is almost always on.
She lives in Michigan with her equally bookish wife, Kim, and their rescue dog, Max.