Gideon the Ninth (The Locked Tomb Series, 1) by Tamsyn Muir

Gideon the Ninth by Tamsyn Muir is the first book in The Locked Tomb Series. This gripping novel follows the story of Gideon, a swordswoman who is forced to team up with her lifelong enemy, Harrow, in order to compete in a deadly trial of skills and wit. As they journey through a haunted palace filled with secrets and danger, Gideon and Harrow must learn to trust each other if they hope to survive. With its fast-paced action, complex characters, and intricate world-building, Gideon the Ninth is a must-read for fans of science fiction and fantasy. This book is available in paperback format.