From the back cover of the Arrow edition 1987
A peaceful summer's --- morning - until a mad physicist triggers off the Bomb... In the nuclear aftermath strange mutants evolve in defragmented world. Only Dangerfield, the lost astronaut, endlessly orbiting the earth with a million miles of tape, can see and hear the consequences. . . And then one of the mutants decides to destroy the last link with the Old World...
From the back cover of the Gollancz edition
Seven years after the day of the bombs, point Reyes was luckier than most places. Its people were reasonably normal - except for the girl with her twin brother growing inside her, and talking to her. Their barter economy was working. Their resident genius could fix almost anything that broke down. But they didn't know they were harbouring the one man who almost everyone left alive wanted killed.