Unlike Quicksilver, which was narrated solely from the protagonist's perspective, Brimstone employs dual point of view, alternating between Saeris Fane and Kingfisher.[3] Hart told E! News she wanted readers to "meet a whole new version" of Kingfisher through his chapters, describing him as more emotionally open and vulnerable than in the first book.[3]
Plot
Following the events of Quicksilver, Saeris Fane has become queen of the Blood Court, though she never sought the title.[1] Her transformation into a Fae-vampire hybrid has left her unable to survive the desert sun of her homeland, Zilvaren. When her ward and brother need help there, she must send Kingfisher and the smuggler Carrion Swift in her place.[4]
Hidden dangers await Kingfisher and Carrion in Zilvaren's narrow alleyways, while back in Yvelia, a darkness spreads across the frozen realm, threatening their friends.[1] Saeris and Kingfisher work to save those they care about, with Saeris continuing to develop her alchemical abilities while navigating the demands of her new role as queen.[4]
Background
Hart has cited Frank Herbert's Dune as an influence on Zilvaren's desert landscape and J. R. R. Tolkien as an influence on the Fae realm of Yvelia.[3] She described second books in trilogies as "notoriously hard to write," noting the challenge of maintaining chemistry between characters after the relationship milestones of a first book have passed.[3] For Brimstone, she said she wanted to "crank up the chemistry between Kingfisher and Saeris to an 11."[3]
Prior to Brimstone's release, Hart published free bonus chapters from Kingfisher's perspective on her website, providing backstory referenced in the novel.[5]
Podium Audio released an audiobook on November 18, 2025, running 24 hours and 30 minutes.[6] Stella Bloom and Anthony Palmini returned as narrators, performing in duet style with Bloom voicing Saeris and Palmini voicing Kingfisher and other male characters.[5]
Reception
Brimstone reached The New York Times bestseller list following its release.[2]
Sequel
The third and final book in the trilogy is expected in November 2026.[7] The title has not yet been announced.[7]
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