Rebecca Yarros' new secretFourth Wingproject is an exciting tease, but the answer to what it could be and what it could mean forThe Empyrean Seriesis quite varied.Rebecca Yarros’Fourth Winghas become a BookTok staple in the short time since the first book’s release, both through the official linear storyline and the theories, hints, and extra content Yarros has provided audiences with each new addition. That expansion of the story seems to be continuing asYarros announced that she is working on a new project forThe Empyrean Seriesahead ofOnyx Storm’s release.
Yarros posted an image recently on herInstagram, announcing that she was working on a secret project forFourth Wing.This comes almost two months before the release of the long-awaited third book of the series and would be the fourth piece of bonus material for the first book, expanding the worldbuilding and characterizations in engaging new ways. Several audience members have already begun theorizing what Yarros' secret project could entail, picking apart the image and caption for any clues on this new addition while creating some fascinating discourse forFourth Wing.

Rebecca Yarros Teased A New Addition To The Empyrean Series: What Her Secret Project Could Be
Yarros Has Already Responded To Certain Theories
Yarros’s newly teased addition toFourth Winghas already created a lot of speculation about what this project could be, with Yarros herself joining the discussion.Yarros' post showcases her e-reader open to the first chapter ofFourth Wing,with the opening epitaph, first sentence, and singular line"I’m so f***ed"highlightedon the device. The caption reveals little information regarding the project, simply announcing the new addition’s existence alongside of Yarros' comments on moving into her new office and her upcoming book tour.
Onyx Storm Reviving An Exciting Book Release Trend Proves How Huge Fourth Wing Really Is
Onyx Storm reviving this exciting and extensive book release trend truly proves how huge Fourth Wing has become and how big it could grow.
Even so, several fans left comments speculating on what the project could be, with many wondering if Yarros was penning a spinoff book or hinting that she was working on the fourth book of the series beforeOnyx Storm’srelease.Yarros denied some theories, such as the possible spinoff bookor that the project was the screenplay forFourth Wing’s Amazon adaptation. The one largely agreed-upon theory is that it will likely be related to the first book, allowing for many a possibletwist forFourth Wingto occur even after the book’s events.

The Author’s Secret Project Seems Related To Fourth Wing, Not Onyx Storm
Yarros' Wording Seems To Hint At A Focus On The First Book
The secret project Yarros hinted towards seems to be related toFourth Wingrather thanOnyx Stormor later books, with clues being embedded in both obvious and subtle places.The main image is the largest clue as the e-reader is open to the first book’s opening chapterwith one of the highlighted points focusing on Conscription Day. As Violet’s Conscription Day has already long since passed, it is likely the story will take place beforeFourth WingorIron Flame’s ending, giving audiences possibly more insight into the recruitment process for the Rider’s Quadrant beforeOnyx Storm.
Onyx Stormis, at the time of writing, set to be released on January 21st, 2025.

Yarros' caption also gives some strong clues, as she says the project will take her back to the beginning where this"whole whirlwind started".This, paired with the highlighted portions of the chapter, are very strong hints that Yarros could write about the events ofFourth Wing,specifically focusing on the day of and even after Conscription Day. What shape that focus will take, however, is still being hotly debated as audiences who loveFourth Wingposit more possibilities for what this project could be.
The Best Theories About Fourth Wing’s Secret Project So Far
Many Fans Have Theorized That The Project Could Be Something In Xaden’s POV
The best theories regardingFourth Wing’s upcoming project include another Xaden POV chapter as well as some form of a spinoff of the Dragon Rider’s Codex, which is quoted heavily inThe Empyrean Series.Considering the highlighted points and Yarros' denial of larger possibilities, it is unsurprising that some comments theorize that the project is anotherXaden POV chapter forFourth Wing.Audiences have wondered what Xaden’s thoughts were on Violet on Conscription Day when they first met, so a bonus chapter detailing how he fell for her is a likely option,especially as Yarros has not explored that yet.
As mentioned, the Codex is referenced and quoted several times in the series, so creating a companion book would be a great way to expand the world that does not disrupt the flow of the main narrative.

Another theory is that it could be a copy of the Dragon Rider’s Codex, as the heavily quoted first epitaph from it is also highlighted. As mentioned, the Codex is referenced and quoted several times in the series, so creating a companion book would be a great way to expand the worldthat does not disrupt the flow of the main narrative. It could also be a short piece on Conscription Day’s origins, giving audiences more insights into the world ofFourth Wingas the third book’s events build the story further.