Rebecca Yarros plans to launch new novella named Threshing Day on 29 September 2026. It appears in the Empyrean series and links to the Fourth Wing saga. Piatkus takes charge of the release. Media outlets reported the title after Yarros revealed it herself. Story specifics remain unknown or the book's cover is available yet. Readers have been eager for the next installment of the popular series. The announcement followed a quiet spell by the writer. The novella will be a supplemental addition, but not a full-length book.