From the back of the book: The fight to save the planet from the Aliens continues! Secret information, brought from the heart of the conspiracy by a patriot -- loyal to humanity and the ideals of freedom. Contained in these pages are secret glimpses into the depths of the conspiracies. New information on the aliens that plague this planet, and find out how to fight them on their own terms. This is the first in a series of supplements for Hidden Invasion. It contains background information on many alien races and other groups involves in the fight for the planet. Also usable with other modern day alien and conspiracy games. Compatible with 1st and 2nd Edition Hidden Invasion.