Rebecca Yarros attends the PEN America 2026 Spring Literary Gala in May 2026.

Joy Malone/Getty Images

Rebecca Yarros' next "Fourth Wing" novel is finally on its way.It's been over a year since Yarros released "Onyx Storm," the third installment in her "Empyrean" series. It followed "Fourth Wing" and "Iron Flame," and tells the story of Violet Sorrengail's journey to become a dragon rider and fight forces of dark magic at Basgiath War College. The series is set to comprise five novels, all published by Entangled's fantasy imprint, Red Tower."Onyx Storm" — the fastest-selling adult novel released in 20 years — ended on a cliffhanger, so Yarros' readers have been clamoring to get their hands on the next romantasy novel in the series since the moment they finished book three.And in a March 2026 Instagram post, Yarros said she's officially writing book four. She's been sharing updates on her progress since then, getting her fans even more excited for what's to come.The rest of this article has spoilers for the "Empyrean" series.Yarros started writing the fourth 'Empyrean' novel in March 2026Yarros released the first three books in the "Empyrean" series in under two years. "Fourth Wing" came out in April 2023, "Iron Flame" was released in October 2023, and "Onyx Storm" hit shelves in January 2025.Yarros made clear she wouldn't be writing book four at the same pace. Speaking at an engagement in Philadelphia on January 25, 2025, Yarros said she wouldn't commit to a release date, as she was planning to write a contemporary novel and spend time with her family first.