Moira Walley-Beckett has exited Amazon's TV series adaptation of "Fourth Wing" after signing on as showrunner last July.

We'll stop the summary there to avoid spoilers, but Fourth Wing is the first of a planned five-book series. Its follow-up, Iron Flame, was published in November 2023, just six months after its predecessor. The third novel, Onyx Storm, had its record-breaking release in January 2025. The fourth and fifth books do not currently have release dates.

For those who don’t know, Schaeffer wrote Black Widow and is the mastermind behind some of Marvel’s best TV shows. She created, wrote, and executive produced WandaVision and Agatha All Along – both of which you can stream with a Disney+ subscription. She was also the showrunner and directed three episodes of Agatha.