In 1928, Rose Wilder Lane — world traveler, journalist, highly-paid magazine writer — returned from an Albanian sojourn to her parents’ Ozark farm. Almanzo Wilder was 71 and Laura 61, and Rose felt obligated to stay and help. Then came the Crash. Rose’s investments vanished and the magazine market dried up. That’s when Laura wrote “Pioneer Girl,” her story of growing up in the Big Woods of Wisconsin, on the Kansas prairie, and by the...