The Atlantean Sourcebook
From the back cover:
"From the dawn of civilization they have walked among us.
They have been our kings, our demons, our angels, and our gods.
For eons, they have shaped human existence.
These are the enigmatic Atlanteans.
The most human of all aliens, they may be humanity's greatest enemy, or our only hope. Immortal, invulnerable, possessed of astounding technology, Atlanteans sit astride the pinnacle that mankind hopes one day to achieve. Will they help us climb to their heights or will they send us tumbling down into an eternity of servitude as their slaves?
Detailed history of the Atlanteans and their culture
An overview of Aegis' knowledge about Atlanteans
Complete rules on Atlantean nanotechnology
New player character option: The Forgotten
Five detailed Atlantean NPCs
A exciting adventure introducing the Forgotten"