Heart of Tin is the 4th prequel novella in the Dorothy Must Die series which was released as an e-book on July 28th, 2016 and published paperback in Dorothy Must Die Stores Volume 2 along with The Straw King and Ruler of Beasts.
- Nimmie Amee is referred to but not named as how she was in The Wonderful Wizard of Oz as the girl he liked before The Wicked Witch of the East cursed him (Amee wasn't named until The Tin Woodman of Oz.)
- He mentions Dorothy explained that coming back to Oz is like: "before that moment was a black-and-white movie, and suddenly you stepped into Technicolor". This is a clear reference to the 1939 film and also suggests the period in which Dorothy returned to Oz in No Place Like Oz which would be between 1922 to 1952.
|Danielle Paige's Dorothy Must Die series|