Brandon Sanderson, a popular author of high-fantasy and science fiction books, has signed a deal with Apple TV to adapt his works set in the fictional universe of Cosmere into films and TV shows. Sanderson SAYS last year at Celsius 232, Spain’s annual sci-fi and fantasy convention, that his final dream project was a “very good Mistborn movie.” Apple TV makes that happen: Some of the first projects to come out of the deal are film adaptations of the Mistborn books and a TV show based on the series.

According to The Hollywood ReporterSanderson’s deal with the streaming service is unprecedented, as he has significant creative control over the adaptations. He writes, produces and consults for projects in development, and has the power to sign off on various aspects of adaptations. That’s a level of control other famous authors like George RR Martin didn’t enjoy. In fact, Martin is new talking about how House of the Dragon showrunner, Ryan Condal, stopped taking his notes and suggestions into the narrative.

Sanderson’s Cosmere universe consists of several books set in different but interconnected worlds and timelines. All of them are bound by a creation myth, which explains where the different types of magic in the universe come from. Apple TV has yet to announce timelines and release dates for projects based on Sanderson’s work, but The Stormlight Archive TV adaptation already has a producer (Blue Marble) attached.