Carson of Venus (Carson Napier Venus Adventures Book 3) (Ace 09200)

192 pp. Frank Frazette cover art. "Carson Napier, first Earthman to reach Venus, had to keep alert every instant to stay alive on that world of mist and mystery. It's lands were unmapped, its inhabitants variegated. He had taken upon himself an obligation to restore a native princess to her homeland, even at the risk of his life."