Prequel Oz is a term that can describe Oz books and films that take place before the timeline of The Wonderful Wizard of Oz.
They tend to be mostly origin stories about the good and bad Witches along with the Wizard with elements that also allow them to fit in the category of alternate Oz. For the most part they try to be consistent with L. Frank Baum's version of Oz.
Entries include:
- Wicked: The Life and Times of the Wicked Witch of the West, the musical and film duology.
- How the Wizard Came to Oz and its upcoming film
- Gabriel Gale's Ages of Oz
- The Hidden History of Oz
- Lion of Oz and the Badge of Courage and its film
- Oscar Diggs, The Wizard of Oz
- Oz the Great and Powerful
Also in the Magic Land series, there is the novel Goodwin the Great and Terrible written by Sergei Sukhinov.