Amazon.com description: Product Description: In this volume, the enigmatic executioner meets his match in the evil Clayborn. If that weren't enough, Horatio's uncle, a religious anti-technology zealot, arrives on the moon of Ylum with the mission of destroying the Gravity Well - the same well that Ursula X. X. Imada, spy and mother to Horatio's twin daughters, hopes will soon suck in the 400 billion people of the Web! Uncle Lathe incites a riot and has his eye on a deadly, Head-designed battle cruiser to further his crusade. Judah takes on the task of training Scarlett, Nexus' extremely powerful young daughter, and Dave and Nexus travel to the library at Alexandria... in 47 B.C.!