Royal assassin Celaena must travel to a new land to confront a truth about her heritage, while brutal and monstrous forces are gathering on the horizon, intent on enslaving her world.

"Aelin has risked everything to save her people--but at a tremendous cost. Locked within an iron coffin by the Queen of the Fae, Aelin must draw upon her fiery will as she endures months of torture. Aware that yielding to Maeve will doom those she loves keeps her from breaking, though her resolve begins to unravel with each passing day. With Aelin captured, Aedion and Lysandra remain the last line of defense to protect Terrasen from utter destruction....