Cassie Dewell is a fictional character created by author C.J. Box. She is a private investigator and the protagonist in the Cassie Dewell series, which includes novels like "The Highway" and "Badlands." Cassie is known for her strong determination and resourcefulness as she navigates complex cases in the rugged landscapes of Montana and Wyoming. In her role as a detective, Cassie often confronts challenging situations involving crime and personal struggles. Her character is portrayed as intelligent and empathetic, making her relatable to readers. The series highlights themes of justice, resilience, and the impact of the environment on human behavior.