Sammy Keyes is a fictional character created by author Wendelin Van Draanen. She is a teenage girl known for her adventurous spirit and knack for solving mysteries. Sammy often finds herself in unusual situations, using her intelligence and resourcefulness to uncover the truth. The series, which began with "Sammy Keyes and the Hotel Thief," features Sammy navigating the challenges of adolescence while tackling various crimes. The books blend humor, friendship, and suspense, making them popular among young readers. Sammy's character resonates with many due to her relatable experiences and determination.