When were Mary Ingalls' sister's books released?
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.
Mary Bard Mary Bard Jensen (1904–1970) was a 20th-century American author best remembered today as the sister of Betty Macdonald ("Mrs. Piggle-Wiggle", "The Egg and I".)