Bantam science fiction

From back cover Del Rey paperback May 1983: A Mission of Terror Per Hiero Desteen was a priest, a telepath -- and a highly trained killer. Together with his great riding moose and the young bear who was his friend, he was on a mission that seemed beyond even his extraordinary powers. For this was five thousand years after the holocaust known as The Death, and the world was greatly changed. Now the evil Brotherhood of the Unclean was waging all-out war against the few remnants of normal humanity, determined to wipe out all traces of its emerging civilization. Hiero's task was to locate and bring back a lost secret of the ancients which might save the humans who were ruled by the Abbeys. But his path lay through the very heart of the unknown territory ruled by the Unclean and their hordes of mutated, intelligent, and savage beast followers. And the Unclean were waiting for him!

The Majipoor Cycle: Volume II.

A mysterious disaster has stricken the midwestern American city of Bellona, and its aftereffects are disturbing: a city block burns down and is intact a week later; clouds cover the sky for weeks, then part to reveal two moons; a week passes for one person when only a day passes for another. The catastrophe is confined to Bellona, and most of the inhabitants have fled. But others are drawn to the devastated city, among them the Kid, a white/American Indian man who can't remember his own name. The Kid is emblematic of those who live in the new Bellona, who are the young, the poor, the mad, the violent, the outcast--the marginalized.