A Barnstormer in Oz: A Rationalization and Extrapolation of the Split-Level Continuum is a 1982 novel by Philip José Farmer. It is a sequel to L. Frank Baum's The Wonderful Wizard of Oz, set some thirty years after, which disregards Baum's own sequels and those of others. The protagonist is Hank Stover, a pilot and the son of Dorothy Gale, who finds himself in Oz when his plane gets lost in a green cloud over Kansas in 1923. The novel was written for adults rather than children, and includes elements of sex and violence.