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Onyx Storm is the third book in Rebecca Yarros’s bestselling fantasy series, The Empyrean
. It was published in January 2025, a little over a year since the publication of the second book in the series, Iron Flame, and sold 2.7 million copies in its first week alone. The first book in the series, Fourth Wing, was published in 2023. The third installment places a thematic emphasis on leadership, the allure of power, fate vs. free will, and the enduring power of love, as its protagonist Violet Sorrengail embarks on a quest far beyond Navarre’s borders to secure allies in the upcoming war against the venin army and save the man she loves.Read a full book summary, in-depth analyses of Violet Sorrengail and Xaden Riorson, and explanations of the novel's famous quotes.