Claire DeWitt is a fictional detective created by author Sara Gran. She is known for her unconventional methods and a deep understanding of the human psyche, often relying on intuition and her unique approach to solving mysteries. Set in a gritty, urban environment, the Claire DeWitt series combines elements of noir and detective fiction. The character is notable for her use of a mysterious guidebook called The Détection, which influences her investigative techniques and philosophy, making her a distinctive figure in contemporary crime literature.