Darth Vader four canon novels to be released in 2014 and 2015. In "Lords of the Sith", Vader and Palpatine find themselves hunted by revolutionaries on the Twi'lek planet Ryloth. In the 2015 "Star Wars" Celebration, it was announced David S. Goyer is helping to develop a virtual reality game based on Darth Vader. It is said that the audience as "visitor" will be able to walk, pick up, push and open things, and might even have some effect in the story. In April 2014, most of the licensed "Star Wars" novels and comics produced since the originating 1977 film "Star Wars"
Star Wars: Episode III – Revenge of the Sith state to fight a Sith Lord. These are a few examples of many descriptions of characters' feelings and inner narrative. There are even some humorous lines added in, including extra dialogue in the battle between Grievous and Obi Wan - Grievous says, "I was trained by Count Dooku," and Obi-Wan replies, "What a coincidence; I trained the man who killed him." An official prequel novel, "Labyrinth of Evil" () by James Luceno, was published in 2005. It is set near the end of the Clone Wars and directly before the events of "Star Wars: Episode III Revenge of the Sith".