Clone trooper film series and in the "Star Wars" expanded universe media, a number of specialized trooper units are seen, including elite special forces units such as the 'Advanced Reconnaissance Commandos' (ARC troopers), and Null ARCs, who usually work alone. All clone commandos and ARCs were trained by Mandalorian mercenaries; the elite Clone Troopers are known as Shadow Troopers. The style and color of a clone troopers armor often varies depending on their rank, specialization, unit, or environment, for example, the clone troopers on Kashyyyk wear camouflage green scout-style armour whereas the 501st legion wears standard white armor with blue accents. Another
Star Wars: The Clone Wars (novel) in the movie. On January 1, 2008 it was announced the publishing company Penguin Group obtained rights to publish books for an upcoming series Star Wars: The Clone Wars. It was revealed Penguin had planned many kinds of books to publsih for the series including a main line novel series based on the movie and the show. Del Rey Books, the company that published the novel series is an imprint of Penguin. Star Wars: The Clone Wars (novel) Star Wars: The Clone Wars, written by Karen Traviss, is the novelization of the animated movie "". The audio book is narrated