The Ork in Oz is a modern Oz book written by Jack and Larry Brenton. It was privately printed in 1974 and published in 2006.
Orville, the Ork from The Scarecrow of Oz (his previously given name, Flipper, was actually a nickname) helps save the Land of Oz from the witches Blinkie (who has taken control of the iron giant) and Mombi.