#threshing-day
3 articles
book
Threshing Day Reading Order (Empyrean, 2026)
Threshing Day sits between Onyx Storm and Empyrean Book 4 as a #3.5 companion. Here is the full series order and whether you must read it first.
Last updated: 10/7/2026
book
Threshing Day Release Date: Out Now + Book 4 Timeline
Threshing Day released September 29, 2026 in the US and UK. Every edition, price, and page count is confirmed here, plus what we know about Book 4.
Last updated: 10/7/2026
guides
What Is Threshing Day in Fourth Wing?
Threshing Day in Fourth Wing is the bonding trial at Basgiath War College where dragons pick first-year riders — and the losers often die.
Last updated: 10/7/2026