Agent Tom Murdoch of Earth Corps and his partner, Charlie Meleno are called back to Philadelphia to investigate yet another terrorist operation by militant factions of Genetically-Enhanced Beings. The GEB never seemed to stop plotting world destruction!Still, with the help of Charlie and of his devoted wife, Murdoch's hard-won sobriety finally had him on the path from outcaste, back to hero...Until things went horribly wrong.Now, he's suffered a devastating loss, and the world teeters on the brink of apocalyptic catastrophe. It's a race against time to save millions of lives, and to find justice for his partner, and for himself.Behind all of this, Tom struggles to make sense of signs that the GEB might not be the only threat facing the world, signs that point to still deeper mysteries and treacheries reaching the highest levels of Earth Corps, and even the young World Government itself...Can Tom hold his life together long enough to save the world?The Source is the thrilling final ride for two of Earth Corps' most beloved heroes.Earth Corps will never be the same.