"Unauthorized Magic" is an Oz short story written by Edward Einhorn; it was published in Oz-story Magazine No. 5 in 1999. Einhorn features characters from both his Oz novels, Paradox in Oz (1999) and The Living House of Oz (2005), in "Unauthorized Magic." In the story, Dr. Majestico (from the first book) has appeared in Oz in the present time; in the Munchkin Country, he is busily but unsuccessfully trying to explode his house, at the bidding of Tempus the time-travelling Parrot-Ox (also from the first book). The problem involves the traditional paradox of the irresistible force versus the immovable object.