Gods Of Riverworld

Thirty billion people from throughout Earth's history have been resurrected along the great and winding waterways of Riverworld. Most began life anew, accepting without question the sustenance provided by their mysterious benefactors. But a rebellious handful, including Mark Twain, Richard Burton, and Peter Jairus Frigate, burned to confront the unseen masters who controlled their fate, and these few launched an invasion that will ultimately yield the mind-boggling truth. The story was chronicled in four previous volumes, and is now concluded in Gods of Riverworld.
Riverworld's omnipotent leaders must finally be confronted, and the renegades of Riverworld, led by the intrepid Sir Richard Francis Burton, will control the fantastic mechanism that rules them. But the most awesome challenge lies ahead. For in the vast corridors and secret rooms of the tower stronghold, an unknown enemy watches and waits to usurp the usurpers....