The Dr. Zeus company thought it had two perfect products: immortality treatments and time travel. Unfortunately, the treatments only worked on toddlers (not rich middle-aged men, the natural market), and entailed a lengthy, risky and very painful series of operations. And time travel was no picnic either: it used immense amounts of energy and, as they found out, history couldn't be changed.
But that restriction applied only to recorded history, so the Company made a new plan -- go back twenty thousand years and create an immortal cyborg army to save all the lost treasures of the world, to be sold to the highest bidder. Along the way, Dr. Zeus found itself the richest, most powerful corporate entity in the history of the world.
Now, in chapters three and four of the unofficial history of Dr. Zeus Incorporated, the plot thickens. Time-travel actually occurs, though it defies the laws of physics as set down in the first two books. Could it be that the Company told a few lies here and there?