Tony And Susan by Austin Tappan Wright

A middle-aged woman receives an unexpected manuscript from her ex-husband and becomes consumed by its brutal story of a mild-mannered man whose family is violently destroyed and whose search for justice turns into grim retribution; the novel alternates between the reader’s fraught real life and the harrowing fiction, using their interplay to examine regret, failed relationships, moral responsibility, and how storytelling can reopen old wounds.