Earth and Firma were twin planets - mirror worlds in a single time-track. Now Firma was halted in its rotation around the sun by the Aliens. Unless Denning and Liston, twin humans, could destroy the Aliens and get Firma moving again, Earth would some day repeat Firma's tragedy and be burned to a cinder.
The Aliens had an incredible array of weapons at their disposal.
Denning and Liston had only their courage and their brains.
Philip E. High (1914 - 2006)
Philip Empson High was an English science fiction author. Born in Biggleswade, Bedfordshire in 1914, his writing career spanned over 50 years and encompassed 14 novels and numerous short stories. Philip E. High made his name initially in the 1950s with a series of short stories for magazines such as Authentic Science Fiction, New Worlds and Nebula. A collection of his short fiction, The Best of Philip E. High, was published in 2002.