The Traitor's Game Series by Jennifer A. Nielsen

Nothing is as it seems in the kingdom of Antora. Kestra Dallisor has spent three years in exile in the Lava Fields, but that won't stop her from being drawn back into her father's palace politics. He's the right hand man of the cruel king, Lord Endrick, which makes Kestra a valuable bargaining chip. A group of rebels knows this all too well -- and they snatch Kestra from her carriage as she reluctantly travels home... moreNothing is as it seems in the kingdom of Antora. Kestra Dallisor has spent three years in exile in the Lava Fields, but that won't stop her from being drawn back into her father's palace politics. He's the right hand man of the cruel king, Lord Endrick, which makes Kestra a valuable bargaining chip. A group of rebels knows this all too well -- and they snatch Kestra from her carriage as she reluctantly travels home. The kidnappers want her to retrieve the lost Olden Blade, the only object that can destroy the immortal king, but Kestra is not the obedient captive they expected. Simon, one of her kidnappers, will have his hands full as Kestra tries to foil their plot, by force, cunning, or any means necessary. As motives shift and secrets emerge, both will have to decide what -- and who -- it is they're fighting for. less

Kestra Dallisor has finally gained possession of the Olden Blade. With the dagger in her control, she attempts to destroy the tyrannical Lord Endrick. But when Kestra fails, the king strips her of her memory, and leaves her weak and uncertain, bound to obey him. Heartbroken, Simon is desperate to return Kestra to the rebel she was, but refuses to use magic to heal her... moreKestra Dallisor has finally gained possession of the Olden Blade. With the dagger in her control, she attempts to destroy the tyrannical Lord Endrick. But when Kestra fails, the king strips her of her memory, and leaves her weak and uncertain, bound to obey him. Heartbroken, Simon is desperate to return Kestra to the rebel she was, but refuses to use magic to heal her. With untrusting Coracks and Halderians threatening to capture and kill her, and war looming on the horizon, Kestra and Simon will have to learn to trust each other again if they have any hope of surviving. But can a heart once broken ever be healed? less

The third book in the Traitor's Game series! Simon and Kestra are hurtling down paths ever farther from each other as the battle for control of Antora rages. Simon, newly king of the Halderians, is pressed on all sides by royal duties. Harlyn Mindell is his betrothed and intended queen, but Simon can't give up hope for a life with Kestra. Kestra, exiled, feels her magic growing -- and despite everyone's warnings, she knows she must embrace it. That power is the key to the kingdom's future... moreThe third book in the Traitor's Game series! Simon and Kestra are hurtling down paths ever farther from each other as the battle for control of Antora rages. Simon, newly king of the Halderians, is pressed on all sides by royal duties. Harlyn Mindell is his betrothed and intended queen, but Simon can't give up hope for a life with Kestra. Kestra, exiled, feels her magic growing -- and despite everyone's warnings, she knows she must embrace it. That power is the key to the kingdom's future. Both still strive to defeat the evil Lord Endrick, but danger awaits them on the murky road forward. And is a common enemy enough to help them survive -- or to carry them back to each other? less