"The Sweet Far Thing" is the third book in the Gemma Doyle Trilogy by Libba Bray. It follows the story of Gemma Doyle, a young girl with magical abilities, as she navigates the challenges of her final year at Spence Academy and her connection to the mystical Realms. In this installment, Gemma faces the consequences of her choices and the growing power of the Order, a group seeking to control the magic of the Realms. The novel explores themes of friendship, identity, and the struggle between good and evil as Gemma seeks to find her place in both the magical and real worlds.