This summary provides the essential information about the book "A Great and Terrible Beauty" in 3 sentences: The book introduces Gemma Doyle, a 16-year-old girl in 1895 who is sent to Spence Academy in London by her grandmother after experiencing visions and a family tragedy in India. At Spence, Gemma makes friends but also discovers that her mother was involved with a mysterious group called the Order and that Gemma has supernatural powers. The story follows Gemma as she tries to understand her abilities and destiny while dealing with the magical and monster-filled world she finds herself in.