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Her Hidden Fire
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- Published: 5 March 2026
- ISBN: 9780241714829
- Imprint: Penguin eBooks
- Format: EBook
- Pages: 416
Brimming with intrigue, romance, and peril, this fast-paced fantasy sweeps readers into a world of impossible choices and breathtaking twists that will leave them racing toward the end. A lush and compelling debut.
Kirkus Reviews
O’Sullivan doesn’t shy away from exploring the human cost of magic and how far patriarchal societies will go to indoctrinate the next generation. This story will captivate any romantasy reader and have them eagerly awaiting the sequel.
Stacey Shapiro, Booklist
Pacey and gripping at every turn, this is a thrilling fantasy about power and patriarchy.
The Bookseller, featured as "Children's Book of the Month"
O’Sullivan deftly interweaves Irish-mythology-inspired worldbuilding with dystopian fantasy trappings to deliver an intriguingly dark romance.
Publishers Weekly, starred review