From the back of the book: There are those who believe that life here began out there, far across the universe... with powerful beings who may have been the forefathers of the Greeks or the Romans or perhaps even the Aztecs. Some believe that even now they fight to survive as Eternals locked in battle against the forces of the demonic Deviants, serving their masters the Celestials and safeguarding humanity against forces to great for normal man to deal with. This book is over 180 pages and includes the description of the Eternals and Deviants, as well as stats and histories for many of those representing each faction.