The Commonwealth Saga is comprised of two books, Pandora's Star and Judas Unchained. It tells the story of the Starflyer War, a genocidal attack by an alien race against humanity set in the Commonwealth, as the collection of planets colonised by humans is known. Two other sets of books are set in the same fictional universe: the Void Trilogy and the Chronicle of the Fallers, and also a prequel, Misspent Youth.