The Star Wars Alien Races Galaxy Guide 4 is a paperback book published by West End Games in 1989. Written by Troy Denning, the book is part of the Star Wars book series and focuses on role-playing games. It provides detailed information about various alien races in the Star Wars universe, allowing players to incorporate these creatures into their gaming experiences. With its English language content and United States origin, this guide is a valuable resource for fans of the Star Wars franchise looking to enhance their role-playing games.