The Mystery Writer by Sulari Gentill

There’s nothing easier to dismiss than a conspiracy theory—until it turns out to be true

When Theodosia Benton abandons her career path as an attorney and shows up on her brother’s doorstep with two suitcases and an unfinished novel, she expects to face a few challenges. Will her brother support her ambition or send her back to finish her degree? What will her parents say when they learn of her decision? Does she even have what it takes to be a successful writer?
What Theo never expects is to be drawn into a hidden literary world in which identity is something that can be lost and remade for the sake of an audience. When her mentor, a highly successful author, is brutally murdered, Theo wants the killer to be found and justice to be served. Then the police begin looking at her brother, Gus, as their prime suspect, and Theo does the unthinkable in order to protect him. But the writer has left a trail, a thread out of the labyrinth in the form of a story. Gus finds that thread and follows it, and in his attempt to save his sister he inadvertently threatens the foundations of the labyrinth itself. To protect the carefully constructed narrative, Theo Benton, and everyone looking for her, will have to die.