Rayguns and rockets! Spacesuited heroes caught in the tentacles of evil insectoid aliens! Who could resist such wonders? Science-fiction paperbacks exploded over the 1940s and '50s literary landscape with the force of an alien gamma bomb. Titles such as Rodent Mutation, The Human Bat vs The Robot Gangster, Dawn of the Mutants and Mushroom Men from Mars appeared from fly-by-night publishers making the most of the end of post-war paper rationing. They...