Avon Fantasy - An Earth Man on Venus #1 (1951)

An Earth man named Myles Cabot crash-lands on Venus and is taken prisoner by the tyrannical King Kew. Befriended by the beautiful Cupian princess Yuri and aided by a jailer named Poblath, Cabot learns the language and customs of Venus while developing feelings for the princess. When King Kew discovers Cabot's presence and plans to execute him, Cabot must navigate political intrigue and dangerous Venusian creatures to survive, culminating in an earthquake that threatens to destroy the world around them.