The "Black Magician Trilogy" is a fantasy series written by Australian author Trudi Canavan. It consists of three novels: "The Magicians' Guild," "The Novice," and "The High Lord." The story follows a young girl named Sonea, who discovers her magical abilities in a society where magic is controlled by an elite group known as the Magicians' Guild. As Sonea navigates her newfound powers, she faces challenges from both the guild and her own past. The trilogy explores themes of power, prejudice, and the struggle for acceptance, making it a compelling read for fans of the fantasy genre.