Wonder Stories June 1932 — Clark Ashton Smith's The Invisible City Cover

Surprisingly dynamic for 1932, this cover depicts two men battling luminous, writhing tentacled energy against a backdrop of alien red rock spires and a swirling vortex of gold and green light — a visual intensity rarely matched even by later pulp art. The tentacles glow with an otherworldly bioluminescence that anticipates psychedelic imagery by decades. Rich cobalt blue sky, burnt orange alien architecture, and explosive warm tones create a fever-pitch scene worthy of Clark Ashton Smith's cosmic horror prose.