Gabriel Gale is an architect and artist whose enchantment with the Oz books began in childhood. In 2017 and 2018, he published two books in his three-book series Ages of Oz, which launched his own conception of a 1,000-year Oz universe based on the characters and intentions of L. Frank Baum's original books. John Fricke is a preeminent Oz historian; his past books include two about the entire Oz phenomenon and two about the famous MGM Wizard of Oz film. Michael Patrick Hearn is the author of the best-selling The Annotated Wizard of Oz and the world's leading authority on L. Frank Baum and his Oz series.