Hellflower (1957)

[Front Cover]"A space-surfer on the skids, a sensuous and deadly narcotic, form an alien chemistry of unstoppable evil!"[Back Cover]"Once He had Been a Star Master---Now He Dealt in Soul-Shattering Ruin...""Farradyne had committed the one unpardonable error a Space Master could make. He didn't die along with the other 32 passengers when his ship smashed into the Bog on Venus.They broke him---exiled him to the rotting fungus fields of Venus.Now his only desire in existence was to return to the cool, gleaming sea of deep space.And there was a way---only one. But he would have to become the vilest parasite in the universe---peddler of a poison that stripped the spirit, before it consumed the body...."