Aliens: Colonial Marines Technical Manual is an in-universe guide written by Lee Brimmicombe-Wood, presenting a detailed breakdown of the United States Colonial Marine Corps, as featured in James Cameron’s Aliens. The book covers weapons, vehicles, starships, tactics, and the organizational structure of the Corps, accompanied by schematics, technical data, and fictional commentary. It’s a must-have for sci-fi enthusiasts, collectors, and worldbuilding fans of the Alien franchise.