All the books in the Saga (Black, Red, White, Green, Chosen, Infidel, Renegade, Chaos, Lunatic, Elyon, Showdown, Saint, and Sinner) contain and explore the powers of the Books of History. The Circle Trilogy first introduces the books; The Lost Books take place in the same world as the Circle Trilogy and take place throughout the Circle Trilogy, taking a different view, following young warriors searching for the original Books of History. Showdown, Saint and Sinner follow the events in our world that happen because of the books' power.