The Open Cage, by Ronald Hall, paperback science fiction novel
“Blue moons and a double sun shine on a frozen sea…
The elements have gone mad after two nations fire nuclear rockets which orbit without exploding but cause global tremors. In the days that follow, three men, brought together by chance, fight for freedom: Alec has fled from Dartmoor; Jacob from a marriage and a failing career; and Addi and Alma are trying to escape from each other.
But where is freedom when all the world’s a cage?”