Meet Celaena Sardothien. Beautiful. Deadly. Destined for greatness. In a land without magic, where the king rules with an iron hand, Celaena, an assassin, is summoned to the castle. She comes not to kill the king, but to win her freedom. If she defeats twenty-three killers, thieves, and warriors in a competition, she is released from prison to serve as the king’s champion. The Crown Prince will provoke her. The Captain of the Guard will protect her. But something evil dwells in the castle of glass—and it’s there to kill. When her competitors start dying one by one, Celaena’s fight for freedom becomes a fight for survival, and a desperate quest to root out the evil before it destroys her world.

Princess Emilia Aurelius was only seven when she watched her mother die at the hands of her father—martyred for believing in the God of the Atlas Empire’s Insurgo rebels. At seventeen, exiled to a military outpost where no one knows her true identity, she’s vowed to leave her royalty behind and explore the truth of the Insurgo rebels her mother loved. When the Emperor of Atlas summons the princesses from each of the provinces to the imperial city to choose a wife for the crown prince, Emilia must leave her military life behind to join a royal court rife with cunning and intrigue. Navigating the waters of court politics and budding love are treacherous on their own, but Emilia fears for her life should anyone learn of her Insurgo sympathies. With an unlikely ally in the captain of the emperor's guard, Emilia must uncover the truth of the Insurgos, start a revolution, and learn to become the princess she’s vowed never to be, all while protecting her heart from a prince who could sign her death warrant.