But before he can carry out his plan, he first must undertake a dangerous voyage to unearth a fallen meteor. This mission would require striking an uneasy alliance with the bloodthirsty Viking Erik Bloodaxe, treacherous King John of England, legendary French swordsman Cyrano de Bergerac, Greek adventurer Odysseus, and the infamous Nazi Hermann Göring. All for the purpose of storming the ominous stone tower at the mouth of the river, where the all-powerful overseers of Riverworld--and their secrets--lie in wait . . .

Intrepid explorer Sir Richard Francis Burton leads the most remarkable voyage of discovery he has ever undertaken. Hot on his heels are Samuel Clemens, King John of England, and Cyrano de Bergerac. Spurred by the promise of ultimate answers, they chart a course across the vast polar sea--and toward the awesome tower that looms above it. But getting there will be more than half the battle. For death on Riverworld has become chillingly final ...

But answers would lead to more enigmatic questions . . .

Who is the Mysterious Stranger who taunted the Riverworld resurrectees with hints of the truth? What is the key to the gargantuan computer that wields the power of life and death? The astonishing secrets lie within the Dark Tower--but only for those brave enough to seek them and wise enough to decipher them . 

Now Riverworld's omnipotent leaders have been confronted, and the renegades of Riverworld--led by the intrepid Sir Richard Francis Burton--control the fantastic mechanism that once ruled 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 . . .