Threshing Day Release Date: Out Now + Book 4 Timeline

When Did Threshing Day Come Out?

Threshing Day — the Wing and Claw Collection, Empyrean #3.5 — was released on September 29, 2026. That is a confirmed, in-the-past date: the book is out now, not upcoming. It published simultaneously in the US through Entangled’s Red Tower Books imprint and in the UK through Piatkus (Little, Brown), with bookstores holding midnight release parties the evening of September 28.

If you missed the announcement cycle, the collection is the first new Empyrean print material since Onyx Storm in January 2025 — and the only one until the next novel. Where it fits in the series is covered in our reading order guide.

Every Edition Available Now

Prices below are from live Barnes & Noble listings at publication; special-edition details come from publisher and bookstore announcements.

The deluxe first edition with the Joe Requeza interior art is the one collectors are hunting: it is tied to the limited first print run, so once stock rotates, the illustrated interior may not reprint. If you only care about the stories, the standard hardcover and eBook are identical in text.

How Many Pages Is Threshing Day?

Honest answer: sources disagree, so do not let either number surprise you. Retailer listings (including Barnes & Noble) put the hardcover at 176 pages, while some early coverage of the announcement says 224 pages. Either way, this is a short-read collection — thirteen stories under roughly 200 pages — designed to be finished in a sitting or two, not a Fourth Wing-length novel.

When Is the Next Empyrean Book?

Book 4 has no title and no release date yet. Yarros has said she is concentrating on writing it, with work reported to be underway since around March 2026, and the series remains planned as five novels. History says to expect a long gap: Onyx Storm arrived two years after Iron Flame. The good news for the wait — Threshing Day exists precisely to bridge it, and you can check whether you actually need it in our reading order breakdown.

While you wait, two good time-killers: replay the bond trial yourself in the free Dragonkind game that launched alongside the book, or dig into the dragons field guide to study every den before the next book’s theorizing starts.

Where to Buy

The book is stocked across the major channels as of October 2026:

• Amazon — hardcover, eBook, and audiobook (a separate sprayed-edges listing has shown as unavailable)
• Barnes & Noble — hardcover, the exclusive-looking special edition, eBook, audiobook, and audio CD
• Target — the sprayed-edges hardcover
• Waterstones — the UK silver sprayed-edges edition

For independent bookstores, the publisher’s site lists authorized retailers. If you want the illustrated deluxe first edition specifically, buy early — the color interiors are tied to the first print run. And if your real question was never the date but “what is this book,” start with our explainer on what Threshing Day is.