I Killed the King Book Cover Enlarge Book Cover

One of Us Is Lying meets Knives Out—with beasts, murder, and magic—in this first book in a thrilling locked-room whodunnit YA fantasy duology by Andrea Hannah and New York Times bestseller Rebecca Mix.

After a decade of war, the kingdoms of Avendell and Istellia have finally agreed to peace. As nobles and magic wielders from both countries arrive at remote Castle Avendell for a historic all-night masquerade to celebrate, King Costis summons an unlikely group to his chambers: the crown prince, his Istellian bride-to-be, his personal guard, a wild beast tamer, and the palace’s questionable new healer. But before Costis can reveal why he has gathered them, the castle goes dark.

When the lights come back, the king is dead—murdered with the princess’s knife, in a weak spot only his guard knew of, and with venom from one of the beast tamer’s monsters lacing the blade.

With no clear killer—and everyone a suspect—they make a risky pact: Tell no one until the treaty is signed. But when a winter storm seals everyone inside and someone aware of the king’s untimely death begins to pick off guests one by one, the six suspects must work together to discover who killed the king . . . before one of them is next.

ISBN: 9780063379619
Imprint: Storytide
On Sale: Sep 16, 2025
List price: $24.99
No of pages: 400
Trim Size: 5.900 in (w) x 8.550 in (h) x 1.150 in (d)
BISAC 1: YOUNG ADULT FICTION / Fantasy / General *
BISAC 2: YOUNG ADULT FICTION / Mysteries & Detective Stories *
BISAC 3: YOUNG ADULT FICTION / Thrillers & Suspense / Supernatural
BISAC 4:
BISAC 5:
BISAC 6:

Rebecca Mix

Biography

Rebecca Mix is a New York Times and indie bestselling author of stories about messy girls, eerie magic, and hope. She spent her childhood tromping through swamps and falling out of very tall trees—which, in hindsight, explains a lot. A reluctant reader at first, she fell in love with books after joining a reading contest to spite her fourth-grade nemesis. Visit her online at rebeccamix.com

Andrea Hannah

Biography

Andrea Hannah is the author of nonfiction and fiction novels for young adults. She teaches creatives all over the globe and writes everything from fierce modern fairy tales to horoscopes (she’s a Gemini). Her work has appeared in Bustle, Elite Daily, Reader’s Digest, Thrive Global, HuffPo, Mslexia magazine, and more. You can find her on socials @andeehannah.

Dan Bittner

One of Us Is Lying meets Knives Out—with beasts, murder, and magic—in this first book in a thrilling locked-room whodunnit YA fantasy duology by Andrea Hannah and New York Times bestseller Rebecca Mix.

After a decade of war, the kingdoms of Avendell and Istellia have finally agreed to peace. As nobles and magic wielders from both countries arrive at remote Castle Avendell for a historic all-night masquerade to celebrate, King Costis summons an unlikely group to his chambers: the crown prince, his Istellian bride-to-be, his personal guard, a wild beast tamer, and the palace’s questionable new healer. But before Costis can reveal why he has gathered them, the castle goes dark.

When the lights come back, the king is dead—murdered with the princess’s knife, in a weak spot only his guard knew of, and with venom from one of the beast tamer’s monsters lacing the blade.

With no clear killer—and everyone a suspect—they make a risky pact: Tell no one until the treaty is signed. But when a winter storm seals everyone inside and someone aware of the king’s untimely death begins to pick off guests one by one, the six suspects must work together to discover who killed the king . . . before one of them is next.

ISBN: 9780063379619
Imprint: Storytide
On Sale: Sep 16, 2025
List price: $24.99
No of pages: 400
Trim Size: 5.900 in (w) x 8.550 in (h) x 1.150 in (d)
BISAC 1: YOUNG ADULT FICTION / Fantasy / General *
BISAC 2: YOUNG ADULT FICTION / Mysteries & Detective Stories *
BISAC 3: YOUNG ADULT FICTION / Thrillers & Suspense / Supernatural
BISAC 4:
BISAC 5:
BISAC 6:

Rebecca Mix

Biography

Rebecca Mix is a New York Times and indie bestselling author of stories about messy girls, eerie magic, and hope. She spent her childhood tromping through swamps and falling out of very tall trees—which, in hindsight, explains a lot. A reluctant reader at first, she fell in love with books after joining a reading contest to spite her fourth-grade nemesis. Visit her online at rebeccamix.com

Andrea Hannah

Biography

Andrea Hannah is the author of nonfiction and fiction novels for young adults. She teaches creatives all over the globe and writes everything from fierce modern fairy tales to horoscopes (she’s a Gemini). Her work has appeared in Bustle, Elite Daily, Reader’s Digest, Thrive Global, HuffPo, Mslexia magazine, and more. You can find her on socials @andeehannah.

Dan Bittner