All we’re saying is that you’d have to spend more than “One Short Day” in Emerald City to learn all of the “Wicked” and “Oz” lore. But if you're eager to dive into more after watching "Wicked: For Good," here's what to know about the original source material, especially for parents.

The holiday season also marks the return of their dynamic light show, with this year’s display appropriately titled “Wonder of Oz.” Every 30 minutes, from 5 to 9 p.m., the complimentary show set to an Oz-inspired soundtrack will dazzle the California skies.

"Wicked: For Good," opening in theaters Friday, is the latest film to draw its inspiration from a stage musical based on a book. Here are nine more.

That’s where Wicked leaves off, but it’s far from the end of the story, as Wicked: For Good will pick up the baton and introduce some familiar faces. Here’s a cast guide for Wicked: For Good, including who plays Dorothy and all the other Wizard of Oz characters.

Driehaus also collected “Oz” books, including one that boasts on the cover text that it is “the only edition containing the complete original text on which the famous Metro-Goldwyn-Mayer movie is based.” (Movie tie-ins, a marketing strategy as old as cinema itself!)

Heritage Auctions is selling several pieces of memorabilia connected to the land of Oz, including the witch’s hat from the 1939 film and a 1903 edition of the book signed by Judy Garland