Query: Novels set in the 25th century
Relevant documents:
Ascending
Nichts von euch auf Erden
Armageddon 2419 A.D.
The Time Hoppers
Firestorm (novel)
Imzadi
Omega: The Last Days of the World
New Amazonia
Buck Rogers: A Life in the Future
Commitment Hour
Expendable
Trapped (Gardner novel)
Vigilant (novel)
Radiant (novel)