As of October 2026, there’s no announced title or release date for Fourth Wing book 4. A fourth main novel is part of Rebecca Yarros’s five-book plan for the Empyrean series.
Where the series currently stands
Rebecca Yarros’s Empyrean page identifies Fourth Wing as Book 1, Iron Flame as Book 2, and Onyx Storm as Book 3. That leaves two books in the stated five-book plan.
The publisher also says the Empyrean novels are best read in order. That won’t surprise anyone who has made it through the first three, but it matters when trying to work out whether a new release is the next main installment or a companion work.
Fourth Wing was published by Red Tower Books on May 2, 2023. Entangled classifies it as New Adult fantasy, while Yarros lists it as fantasy romance and romance.
Those labels are useful if you’ve reached this page before starting the series. The books aren’t simply dragon-school fantasy with romance tucked around the edges. The romantic plot and the fantasy plot both carry weight.
The series has also become a large publishing event. In July 2025, Publishers Weekly reported that the standard and deluxe editions of Onyx Storm sold more than two million copies in the first half of that year. That scale helps explain the intense interest in the next numbered book.
What a fourth Empyrean book would have to follow
The spoiler-free setup of Fourth Wing is straightforward. Violet Sorrengail is ordered to train as a dragon rider at Basgiath War College.
From there, the series builds across numbered books that are intended to be read in sequence. Discussing where Book 4 might begin would require talking about later developments, so there’s no reliable plot description until an official synopsis appears.
The tone is worth remembering too, especially if it has been a while since your last visit to Basgiath. Yarros’s content note for Fourth Wing includes war, battle, violence, blood, injuries, death, poisoning, graphic language, and on-page sexual activity.
No Book 4-specific content note has been released. The first book’s note can tell you what kind of material the series already contains, but it can’t stand in for guidance on an unpublished installment.
There is also Threshing Day, which can make the release order look less clear at a glance. It’s a 13-story Empyrean companion release, not the fourth numbered novel, and it was available by October 2026.
In October 2026, Publishers Weekly reported that Threshing Day sold 857,802 print copies in its first week. That gives readers more Empyrean material while they wait, but it doesn’t replace Book 4 in the five-book structure.
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Fourth Wing book 4 release date, title, and format are still unknown
The Fourth Wing book 4 release date hasn’t been announced. There’s also no public publisher announcement date, so we don’t know when that news itself will arrive.
The title of Book 4 in the Fourth Wing series remains unknown as well. No official cover, synopsis, length, point of view, or final format lineup has been released as of October 2026.
Without a date from the author or publisher, there’s no sound basis for calculating a release window.
There is a related dated release on Yarros’s site. As of October 2026, Fourth Wing Graphic Novel: Vol. 1 was listed for April 6, 2027, and Yarros is adapting the first graphic-novel volume herself.
That graphic novel isn’t Book 4. It adapts existing material in another form, while the next numbered Empyrean novel remains unannounced.
Fourth Wing book 4 and 5, and why the plan changed
In October 2026, Marie Claire reported that Yarros said the series was originally plotted for three books before expanding to five. That change explains why older impressions of the series may not match its current shape.
The expansion also places Onyx Storm differently within the larger structure. It’s Book 3 of five rather than the final volume of a trilogy.
For readers checking on Fourth Wing book 4 and 5, the important distinction is between the series plan and individual book announcements. The five-book structure is established, but the next volume’s publishing details haven’t appeared yet.
That gap can feel odd. We know the story is meant to continue while knowing almost nothing official about the next installment.
What readers still don’t know yet
As of October 2026, these details haven’t been announced:
- Book 4’s title
- Its release date and publisher announcement date
- The cover and synopsis
- The book’s length and point of view
- The final format lineup
- Book 4-specific age guidance or content notes
There can’t yet be Book 4 awards, reviews, or bestseller status, since the novel hasn’t been released.
We also don’t know whether Threshing Day will be necessary reading before Book 4. It’s clearly identified as a companion collection rather than a numbered installment, but no official guidance says readers must finish it before continuing the main series.
Adaptation questions sit in a separate pile. The cast, filming schedule, premiere date, and episode count for the Prime Video series remain unknown. It’s also unknown whether a separate Fourth Wing feature film is planned.
How to stay current without getting spoiled
As of October 2026, Yarros identifies her newsletter as the channel for updates about upcoming releases. It’s the most direct place to look for an official title, date, or synopsis without surrounding that news with discussion of later events in the published books.
Be careful with searches aimed at Book 4 in the meantime. Even though official story information for the unpublished novel isn’t available, those discussions can contain very real spoilers for Iron Flame and Onyx Storm.
While you wait for Fourth Wing book 4, Fantasy Read gives you spoiler-free context on characters, places, relationships, and concepts in EPUB books you upload, limited to the point you’ve reached. It’s built for that moment when Basgiath feels familiar, but a name on the page doesn’t.