A Barnstormer in Oz, subtitled A Rationalization and Extrapolation of the Split-Level Continuum, is an alternate Oz novel written by Philip José Farmer and published by Berkley Books in 1982. Hank Stover, a stunt pilot (who does "Barnstorming") and the son of Dorothy Gale, finds himself in Oz when his plane gets lost in a green cloud over Kansas in 1923. The Oz he discovers is on the brink of civil war as he encounters Erakna, the new Wicked Witch who is waging it.