Warrior of Llarn — Gardner Francis Fox

Near Canopus there is a small red sun, around which eleven planets revolve. One of these is Llarn a world which resembles Earth in some ways, but in others is exotically different. There were men and women there, fallen empires, forgotten cities, and roving barbarians striving to rise. And there were the dreaded remnants of a hideous atomic disaster eons past--things that once were men with powers that bordered on the evilly miraculous.

Alan Morgan came to Llarn at the behest of one of these warped man-monsters to act as his envoy on a world-shaking mission. But Alan was no puppet... and the story of his extraordinary adventures on that world of swordplay and wonders is a constantly exciting novel.