Last updated: July 29, 2026
If you’ve already devoured Fourth Wing, Iron Flame, and most recently Onyx Storm, chances are you’re counting the days until Rebecca Yarros releases Book 4 in The Empyrean series. But first, we’re getting something unexpected: Threshing Day, a standalone Empyrean release featuring 13 stories about beloved characters and their dragons. It arrives on September 29, 2026 — and no, it is not Book 4.
📖 Read While You Wait for Book 4
Threshing Day releases on September 29, 2026 and features 13 new stories about beloved characters and their dragons.
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Fourth Wing Book 4 Release Date
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Update: The September Empyrean release is officially titled Threshing Day. It will feature 13 stories about beloved characters and their dragons, all centered on the day their bonds began.
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Update: Rebecca Yarros announced a new Empyrean release arriving on September 29, 2026 — and confirmed it is not Book 4.
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Update: Rebecca Yarros confirms she has officially started working on Book 4, marking the beginning of the next installment’s writing process.
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Update: Rebecca Yarros shares a Book 4 playlist, strongly suggesting active plotting despite no official release date.
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Context: Onyx Storm releases as Book 3, confirming the series is moving into its back half (five books planned).
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Update: Retailer and Goodreads listings circulate a “January 2026” placeholder date, which is not official.
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Author note: Yarros says a January 2026 release is “impossible” and confirms she plans to write a contemporary romance first.
So what does that mean for Fourth Wing Book 4? The biggest thing to know is this: Threshing Day is a separate, standalone Empyrean release, while Book 4 remains untitled and still has no official release date.
What’s the release date for Fourth Wing Book Four? The Painful Truth
Let’s get this out of the way first: there is still no official release date for Fourth Wing Book 4.
The next Empyrean release now has an official title: Threshing Day. It arrives on September 29, 2026, but it is a standalone collection of 13 stories rather than the fourth main book.
Yes, Goodreads and a few retailer listings previously teased “January 2026.” But Yarros herself took to Instagram to crush our hopes: “That release date is impossible.”
Why? After the whirlwind of the first three books, Yarros said she’s taking a break. She planned to write a contemporary romance novel first, spend time with family, and pace herself for the back half of the series.
Translation: Book 4 is not expected in 2026. With Threshing Day scheduled for September 2026, a 2027 release window for the actual fourth book may feel more realistic — but that remains speculation until an official date is announced.
Is Threshing Day Fourth Wing Book 4?
No. Threshing Day is not Fourth Wing Book 4.
Rebecca Yarros has confirmed that Threshing Day is a standalone Empyrean release arriving on September 29, 2026. The book contains 13 stories about beloved characters and their dragons, all centered on Threshing — the day dragons choose their riders and their bonds begin.
The full lineup of characters has not yet been revealed. It is also still unclear whether the stories will revisit familiar events from new perspectives, reveal entirely new moments, or include clues that could become important in Book 4.
For Fourth Wing Book 4, that means one thing: the fourth main installment remains untitled and still has no official release date.
A Quick Refresher: The Empyrean Roadmap
The series is planned as five books total.
- Fourth Wing (May 2023)
- Iron Flame (Nov 2023)
- Onyx Storm (Jan 2025)
- Threshing Day — September 29, 2026 (standalone story collection)
- Book 4 (TBA)
- Book 5 (TBA, finale)
So the main series is still planned as five books, with Threshing Day serving as an additional standalone release rather than one of those five installments. Its 13 stories will revisit the bond between familiar characters and their dragons on the day of Threshing.
Why This Wait Feels Different: Release History Context
Let’s talk about the release schedule for a second. Fourth Wing came out in May 2023, and then just six months later, Iron Flame landed in November. Readers barely had time to breathe before getting wrecked again.
That lightning-fast turnaround fueled the phenomenon. TikTok was in a constant state of chaos, theories were coming faster than Yarros could confirm or deny them, and the fandom doubled in size practically overnight.
By the time Onyx Storm dropped in early 2025, Yarros had delivered three hefty, emotionally devastating books in under two years. That’s an incredible pace — and also unsustainable.
Other fantasy giants like Sarah J. Maas, Holly Black, and Leigh Bardugo often space their books 1–2 years apart. Yarros sprinted through three in record time. So now that she’s slowing down? Honestly, it’s normal. Painful for us, sure, but healthy for her and probably better for the story.
What Yarros Has Actually Teased about Book 4?
Rebecca Yarros has a habit of giving us just enough to spiral without confirming anything. Here are the major things she’s admitted about Book 4:
- Xaden will be in his villain era
- “Someone you love won’t make it.” (yes, we’re screaming)
- “Pay attention to who’s missing at the end of Onyx Storm.”
- “Pay attention to someone who feels like what they’ve given isn’t enough — that’s always how you turn venin.”
- Violet’s signet power is only at 10%.
- Xaden’s is only at 50%.
- We will learn what happened in the missing 12 hours
- The Isles map was withheld from Onyx Storm because it was “too spoilery.”
- There will be “dream-sex”
- We will learn more about Grandma Niara & what other big secrets she is keeping
Oh, and she dropped a Book 4 playlist featuring songs from Taylor Swift’s Tortured Poets Department. Which basically screams: heartbreak, betrayal, and messy emotions incoming.
Dragon Lore That Could Change Everything
One of the most mind-blowing reveals: dragon names.
After Threshing, the rider announces the dragon’s name to the Scribes. But the dragons themselves? They never confirm it.
Which means:
- Some names might be wrong.
- Some dragons could be lying.
- Riders may not even know their dragon’s true name.
That’s a huge deal when so much magic and identity is tied to dragons. Imagine the fallout if a bond is based on a false name.
Add in the missing dragon eggs from Onyx Storm and the still-mysterious Isles, and we’re clearly heading toward massive dragon-lore revelations in Book 4.
Character Spotlights: Where Could They Go Next?
Violet Sorrengail
Her signet is only 10% tapped, which means we’ve barely scratched the surface. Dream-walking already lets her slip into memories — imagine the chaos if she gains control over entire dreamscapes. The question isn’t just how powerful she’ll become, but how much it will cost her.
Xaden Riorson
At 50% power, Xaden is already terrifying. When he hits 100%? We might see entirely new abilities, or a level of control that makes him unrecognizable. But his venin-touched condition adds layers of danger — power growth could come with corruption.
Dain Aetos
Once one of the fandom’s least-loved characters, Dain’s redemption arc is gaining traction. Yarros has confirmed he’ll get POV chapters, which means we’re about to see his inner conflict up close.
Ridoc
Finally stepping into the spotlight. Yarros has said Ridoc’s humor is a mask for pain. Expect a much heavier, emotional storyline that adds depth beyond the class clown vibes.
Sloane Mairi
Yarros confirmed Dain & Sloane are endgame — which means her arc is far from a side story. She’ll likely play a bigger role in the political and emotional stakes of Book 4.
POVs: Who Gets the Mic?
Multiple POVs are officially here to stay. Yarros has confirmed:
And possibly more — she’s said you “can’t witness character development without POV.” So don’t be surprised if others sneak in.
The Venin Question
Yarros warned: “Pay attention to someone who feels like what they’ve given isn’t enough — that’s how venin are born.”
That line has fandoms speculating non-stop. Who’s vulnerable?
- A sidelined rider desperate to prove themselves?
- Someone who’s lost too much?
- Or a major character we’d never expect?
If Book 4 delivers another character turning venin, it could fracture trust inside the rider ranks completely.
Themes We’re Bracing Ourselves For
Based on the clues, here are the big themes to expect:
- Power growth → Violet and Xaden’s signets leveling up.
- Sacrifice → we’re losing someone beloved.
- Corruption → venin temptation front and center.
- Secrets → dragon names, missing maps, hidden motives.
Love under fire → Violet and Xaden’s relationship is heading into stormy territory.
Fan Theory Spiral
Let’s be real: half the fun is theorizing wildly. Current top theories include:
- Xaden at full power. What if he surpasses the dragons themselves?
- The Isles = massive twist. Some fans believe the missing map hides an entirely new civilization.
- Which dragon is lying about their name? And what happens when the truth comes out?
- Who turns venin next? The fandom is divided, but almost everyone has a suspect.
- Relationship chaos. Between Dain & Sloane being endgame and Xaden’s condition, Violet’s love life might be in for brutal choices.
Beyond the Books: Adaptations and More
While we wait, Yarros isn’t leaving the Empyrean world behind. She’s:
- Executive producing the Amazon MGM TV adaptation. No cast yet, but the project is in development.
- Co-adapting graphic novels for the first three books.
FAQ: Quickfire Answers
Does Fourth Wing Book 4 have a release date?
No. An official release date has not yet been announced.
Is Threshing Day Fourth Wing Book 4?
No. Threshing Day is a standalone Empyrean release featuring 13 stories about beloved characters and their dragons. It is separate from the fourth main book.
What’s the title of Book 4?
Not announced.
How many POVs will Fourth Wing Book 4 have?
At least four: Violet, Xaden, Dain, Ridoc.
Will someone die in Fourth Wing Book 4?
Yes. Yarros has said “someone you love won’t make it.”
Will Violet and Xaden stay together?
Unknown — but the playlist hints at messy, complicated love ahead.
Will Book 4 include a map of the Isles?
Highly likely, since Yarros admitted it was withheld from Onyx Storm to avoid spoilers.
Is Dain getting redeemed?
He’s getting POV chapters — so we’ll find out.
Final Thoughts
Book 4 of Fourth Wing is going to be devastating, electrifying, and absolutely worth the wait.
Rebecca Yarros has been planting seeds since Book 1 — dragons hiding their true names, signets only partly unlocked, venin temptation simmering — and in Book 4, those threads are going to explode.
We don’t know the title, we don’t know the release date, but we do know this: when it arrives, it’s going to shatter us. And we’ll love every second of it.
Before Book 4 arrives, Threshing Day will take us back to one of the most important moments in every rider’s life: the day their dragon chose them.
Until then? We’ll be overanalyzing playlists, building theories, and rereading the series with suspicious eyes.
Absolutely love this series, I hope that we get to see the Erad Dragons in the upcoming books