After the release of Star Wars, other writers developed the Star Wars Expanded Universe, which includes three spin-off films, five television series and an extensive collection of licensed books, comics, video games, action figures, trading cards, and other merchandise, all set within the fictional Star Wars galaxy. In 2007, the overall box office revenue generated by the entire Star Wars franchise (over the course of its history) is at around US$4.3 billion, making it one of the most successful franchises of all time though recently the Harry Potter Franchise, with still two films left, surpassed Star Wars with earnings totaled at US$4.47billion.