I killed the King - Rebecca Mix, Andrea Hannah

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