Legacy of the Force: Invincible is the ninth and final novel in the Legacy of the Force series. It is a hardcover by Troy Denning and was released May 13, 2008. Its title was first announced at Celebration IV. The paperback version was released on December 30, 2008. The audio version is narrated by Marc Thompson. This book determined the final fate of Darth Caedus. The end of the book introduces Millennium Falcon. The cover features the final duel between Darth Caedus and Jaina Solo.