Overview
- Yarros announced she will postpone the long‑awaited fourth Empyrean novel and publish Threshing Day, a 13‑story companion revisiting Basgiath, to give readers new material before the main book is ready.
- The collection will include Xaden Riorson’s perspective and a deluxe first edition with original illustrations, and it is scheduled for release in late September 2026.
- Yarros has said she slowed her earlier rapid publishing pace to prioritize her health, family and other projects and resumed work on book four earlier this year while sharing progress updates on social media.
- No firm publication date has been set for the fourth novel, which Yarros has hinted will use multiple points of view to address unresolved plotlines left at the end of Onyx Storm.
- The move keeps momentum for the Empyrean franchise — a multi‑million copy seller with a TV adaptation in development — by giving fans interim storylines and helping sustain sales and attention while the author completes the next installment.