The Steam Engines of Oz is a sci-fi steampunk Oz comic series that is written by Sean Patrick O'Reilly, Erik Hendrix, and Yannis Roumboulias. After raising money from a Kickstarter campaign, the series made its first issue debut as a part of Free Comic Book Day 2013. The series is a semi-sequel to The Wonderful Wizard of Oz which takes place around 100 years where technology has heavily advanced.