Laura Ingalls Wilder collaborated with her daughter on many books in the Little House on the Prairie series, and it wasn’t always a cooperative arrangement. A letter from 1938 suggests the scope of their creative frictions: “Here you have a young girl,” Wilder’s daughter wrote to her about one character, “a girl twelve years old, who’s led a rather isolated life with father, mother, sisters in the country, and you can not have her suddenly acting like a slum child who has protected her virginity from street gangs since she was seven or eight.”

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