If you are a big Alien fan like myself and wish to immerse yourself in the lore or if you are just liking the Pulse Rifle then this book is for you. It does a deep dive into the lore of the Colonial Marines and their equipment. It lays it out in a detail that will pleae even hardcore fans. The attention to detail makes you believe it really is a piece of equipment to be found in the real world. A must-have for ANY Aliens fan.