Star Wars: Lost Stars is a 2015 young adult science fiction novel by Claudia Gray set in the Star Wars universe. The book is set before, during, and after the events of Star Wars, The Empire Strikes Back and Return of the Jedi, in which the Galactic Empire has tightened its stranglehold on systems in the Outer Rim while the Rebel Alliance also grows in strength. The novel depicts the story of two childhood friends, Ciena Ree and Thane Kyrell, who end up on opposite sides of the conflict: Thane defects to the Rebel Alliance, while Ciena stays in the Galactic Empire. While the two struggle to reconcile their loyalty to the organizations with their friendship with each other, a romance blossoms between the two. Source: Wikipedia (en)