<P> It was also around this time that Lane began intensively encouraging Wilder to improve her writing skills with a view toward greater success as a writer than Lane had already achieved . The Wilders, according to Miller, had come to "(depend) on annual income subsidies from their increasingly famous and successful daughter ." They both had concluded that the solution for improving their retirement income was for Wilder to become a successful writer, herself . However, the "project never proceeded very far ." </P> <P> In 1928, Lane hired out the construction of an English - style stone cottage for her parents on property adjacent to the farmhouse they had personally built and still inhabited . She remodeled and took it over . </P> <P> The Stock Market Crash of 1929 wiped the Wilders out; their daughter's investments were devastated as well . They still owned the 200 acre (81 hectare) farm, but they had invested most of their savings with their daughter Rose Wilder Lane's broker . In 1930, Wilder requested Lane's opinion about an autobiographical manuscript Wilder had written about her pioneering childhood . The Great Depression, coupled with the deaths of Wilder's mother in 1924 and her older sister in 1928, seem to have prompted her to preserve her memories in a life story called Pioneer Girl . Wilder also hoped that her writing would generate some additional income . The original title of the first of the books was When Grandma Was a Little Girl . On the advice of Lane's publisher, Wilder greatly expanded the story . As a result of Lane's publishing connections as a successful writer and after editing by Lane, Harper & Brothers published Wilder's book in 1932 as Little House in the Big Woods . After its success, Wilder continued writing . The close and often rocky collaboration between her and Lane continued, in person until 1935 when Lane permanently left Rocky Ridge Farm, and afterward by correspondence . </P> <P> The collaboration worked both ways: two of Lane's most successful novels, Let the Hurricane Roar (1932) and Free Land (1938), were written at the same time as the "Little House" series and basically retold Ingalls and Wilder family tales in an adult format . </P>

When was laura ingalls wilder first book published