"Dorothy Must Die" is the first book in the "Wicked" series, a spin-off of the "Land of Oz" series by Gregory Maguire.
While there are many more books in the "Land of Oz" series, none of them directly follow "Dorothy Must Die."
However, if you're looking for more stories in the same universe, you can check out the following:
* "Out of Oz" (2014): The second book in the "Wicked" series.
* Other books in the "Land of Oz" series: These include "Wicked," "Son of a Witch," "A Lion Among Men," and more. Each book explores different aspects of Oz, including its history and characters.
If you are interested in reading more books about Dorothy and the Land of Oz, you can find a complete list of books in the "Land of Oz" series on the author's website or on a book retailer's website.