The Little Sister is a 1949 novel by Raymond Chandler, his fifth featuring the private investigator Philip Marlowe. The story is set in Los Angeles in the late 1940s. The novel centers on the younger sister of a Hollywood starlet and has several scenes involving the film industry. It was partly inspired by Chandler's experience working as a screenwriter in Hollywood and his low opinion of the industry and most of the people in it. The book was first published in the UK in June 1949; it was released in the United States three months later.