Onyx Storm by Rebecca Yarros book cover

Onyx Storm

by Rebecca Yarros · 2025

Violet Sorrengail survives Basgiath War College only to find the real war -- against creatures the wardens said were myths -- was the thing she was actually being trained for.

Worth reading? Onyx Storm delivers exactly what the first two books promised and nothing more -- bigger battles, higher body counts, and Violet and Xaden's relationship put under more strain than either book managed. It's not a place to start the series and it's not trying to be; it's the middle-to-late chapter for readers already invested, and on those terms it does the job.

Full TitleOnyx Storm (The Empyrean, Book 3)
AuthorRebecca Yarros
Published2025
PublisherRed Tower Books
CategoryFiction
Favorite quote“We have dragons to ride.”

ISBN: 9781649377159ISBN10: 1649377150ASIN: 1649377150

The Verdict

The thing that keeps this series from collapsing into pure wish-fulfillment is that Yarros never lets Violet’s competence come free. Every advantage she gains in Onyx Storm costs her something – physically, politically, or in what she has to accept about Xaden – and that refusal to let power be free is the difference between this and a weaker entry in the genre.

Read it if

you're already in the Empyrean series and want the next installment of dragon-riding, war-college politics, and the Violet/Xaden relationship pushed further into crisis

Onyx Storm by Rebecca Yarros: book review and summary

Book Summary

The series' engine has always been institutional distrust -- the wardens at Basgiath have been lying about the nature of the threat since book one, and Onyx Storm pushes that thread further: the venin aren't a contained problem, they're an active war the leadership underprepared everyone for. Violet keeps discovering that the people running her world knew more than they said, and each revelation makes the previous books' politics look worse in hindsight.

The second thread is what survival costs a relationship. Xaden's arc has been building toward a reckoning since Iron Flame, and Onyx Storm forces Violet to decide how much of him she can love once she sees the full cost of what he's become to protect her and the world. The romance was never separable from the war -- this book makes that explicit.

Top 7 Lessons from Onyx Storm

  1. Institutions that lied to protect their own comfort don't stop lying just because the stakes get higher -- Basgiath's leadership keeps rationing the truth even as the venin threat becomes undeniable.
  2. Violet's disability (her brittle bone disease) is never written as an obstacle she overcomes and forgets -- it stays present in how she fights, which is more honest than most fantasy handles physical difference.
  3. Loving someone who's done terrible things in a war you're also fighting isn't a clean moral position -- Xaden's choices force Violet to hold both his necessity and his cost at once, without a tidy resolution.
  4. The dragons in this series are never just power fantasies -- Tairn and Andarna's bond with their riders carries real consequence and real loss, which is what separates this from weaker entries in the genre.
  5. Competence under an incompetent chain of command is its own kind of trap -- Violet keeps having to choose between following orders and doing what she knows is right, and neither choice is free.
  6. Found family forged under mortal stakes reads differently than found family forged in comfort -- the squad loyalty in this series is earned through actual combat losses, not shared meals.
  7. Escalating a series' stakes book over book only works if the emotional relationships escalate with it -- Onyx Storm succeeds mainly because Violet and Xaden's trust problems get harder, not because the battles get bigger.

Top 1 Quotes from Onyx Storm

"We have dragons to ride."

Rebecca Yarros, Onyx Storm

Frequently Asked Questions

Do I need to read Fourth Wing and Iron Flame before Onyx Storm?

Yes. Onyx Storm is a direct continuation with no recap for new readers -- start with Fourth Wing.

Is Onyx Storm worth reading if I liked the first two books?

Yes -- it raises the stakes on both the war plot and the central romance, and delivers on threads the first two books set up.

Is Onyx Storm the last book in the Empyrean series?

No, the series is planned to continue beyond this installment.

Is Onyx Storm romance or fantasy?

Both, in roughly equal measure -- it's shelved as romantasy, with a war-college fantasy plot carrying an equally central romance arc.

Ready to read it?

Get Onyx Storm on Amazon