When were Mary Ingalls' sister's books released?
Mary Ingalls:  She was the older sister of author Laura Ingalls Wilder, who is best known for her "Little House on the Prairie" book series. Laura Ingalls Wilder: Laura Ingalls Wilder ( ; February 7, 1867 – February 10, 1957) was an American writer known for the "Little House on the Prairie" series of children's books released from 1932 to 1943 which were based on her childhood in a settler and pioneer family.
1932 to 1943