The Little House series is based on decades-old memories of Laura Ingalls Wilder's childhood in the Midwest region of the United States during the late 19th century. The best-known of the books is Little House on the Prairie. The books are told in the third person, with Laura Ingalls acting as the central character and protagonist, and are generally classified as historical fiction rather than as autobiography, although several of the later books are almost purely autobiographical. Wilder's daughter, author and political theorist Rose Wilder Lane, assisted her mother with the editing of the works. The depth of her involvement, and the extent of her influence on the theme and content of the books, has been the subject of some debate in recent years, but almost all Laura scholars and her biographers consider that the writing of the books was a tense but ultimately effective continuing collaboration between mother and daughter — Laura writing the books, Rose editing them.