The Gemma Doyle Trilogy is a series of young adult fantasy novels written by Libba Bray. It consists of three books: A Great and Terrible Beauty, Rebel Angels, and The Sweet Far Thing. The story follows Gemma Doyle, a young girl in Victorian England, who discovers her magical abilities and becomes involved in a secret society called the Order. Set in a world where magic and reality intertwine, the trilogy explores themes of friendship, power, and self-discovery. As Gemma navigates her new abilities, she faces challenges from both the magical realm and societal expectations, ultimately shaping her destiny and the fate of her friends.