↑Silverblatt, Art (2007). Genre Studies in Mass Media: A Handbook. M. E. Sharpe. p. 211. ISBN9780765616708. Prequels focus on the action that took place before the original narrative. For instance, in Star Wars: Episode III – Revenge of the Sith the audience learns about how Darth Vader originally became a villain. A prequel assumes that the audience is familiar with the original—the audience must rework the narrative so that they can understand how the prequel leads up to the beginning of the original.