A fatal sin emerges in the next gripping psychological suspense novel by USA Today Bestselling Author Kennedy Layne…

For years, former FBI consultant Brooklyn Sloane has hunted monsters hiding behind carefully crafted masks. Predators. Manipulators. Killers who walked among ordinary people unnoticed. But this time, the darkness she’s spent years chasing leads her to a pivotal moment where she’s finally forced to confront her past.

Brook has always known there was something broken inside her brother. Something depraved lurking beneath the surface that no amount of charm, intelligence, or carefully rehearsed lies could conceal. Now, standing face-to-face with the horrifying truth, she comes to terms with something even darker within herself—the realization that she’s far more like Jacob than she ever wanted to admit. The difference is that Brook understands the line between right and wrong. She feels empathy. Remorse. And she accepted long ago that it falls to her to stop him…by any means necessary.
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But monsters rarely surrender quietly. As a deadly game spirals toward its shocking conclusion, Brook finds herself pulled into a final confrontation with a killer who knows her better than anyone else ever could. And when her carefully laid plans begin to unravel, she realizes that surviving Jacob may cost far more than she’s willing to lose.