Title: Strength of Stones
First published: December 1981
Description: From back cover of Millennium paperback published Great Britain 1999  ISBN 1857989031:

THEY WERE BUILT TO HOLD THE HOPES OF MANKIND.  THEY EXPOSED ONLY HIS FOLLY...

In the deserts of God_Does_Battle the Cities stand alone, as beleaguered as the aspirations of mankind.  Those still alive are silent -- like stars in a dying universe, they await dust and decay.  Yet within the living plasm of their fragmented structures an ancient programme still works, implanted by the human creators cast out a thousand years ago.  Before long, it is clear, some of the Cities will be fighting extinction.  And many of them will do battle in a quite unexpected way...
Subjects: Science Fiction, Fiction, Fiction, science fiction, general, Fiction, fantasy, general, Perrin, michael (fictitious character), fiction, California, fiction, Los angeles (calif.), fiction