When does Fourth Wing return?

Fourth Wing is a 2023 new adult fantasy novel by American author Rebecca Yarros. It is the first installment in the Empyrean series. The novel's protagonist Violet displays many symptoms and parallel experiences to those with Ehlers–Danlos syndromes, including joint pain and hypermobility. The book achieved viral success on TikTok's reader community BookTok, which propelled it to reach No. 1 on The New York Times bestseller list. Its sequel, Iron Flame, was released in November 2023.