The Locked Door by Freida McFadden is a twisty psychological thriller about Nora Davis, a successful surgeon whose life is shadowed by a horrific childhood secret — her father was a notorious serial killer operating in their home. Decades after his arrest, Nora has built a quiet, solitary life while keeping her past hidden. But when one of her young patients is murdered in the same chilling manner as her father’s crimes, suspicion starts to fall on her. As someone seems intent on framing her and exploiting her dark history, Nora must confront her deepest fears, untangle the truth, and fight to prove she isn’t the monster others believe she might be. The story blends suspense, mystery, and psychological tension with shocking twists that keep the pace gripping from start to finish.