Throne of Glass is a young adult high fantasy novel series by American author Sarah J. Maas, beginning with the entry of the same name, released in August 2012. The story follows the journey of Celaena Sardothien, a teenage assassin in a corrupt kingdom with a tyrannical ruler, the King of Adarlan. As the tale progresses, Celaena forms unexpected bonds and uncovers a conspiracy amidst her adventures. The series concluded with the eighth book in October 2018.