Book II : The Revelations (the Fallen Race Trilogy)

As Sean digs to the heart of this conspiracy, he learns that a ruthless and clandestine group of Americans known as the Foundation has known for decades about the existence of extraterrestrials and their secret history on the planet, a detailed history dating back to nearly World War II. As the moment approaches for a climactic meeting between the Foundation and this dangerous threat, the stakes are nothing less than humanity's continued existence, and the result of which will determine whether there is a future for any of us.