20 Million Miles to Earth – Amazing Stories Novelization Cover, 1957

Rome is under siege — not by invaders from history, but from the stars. A towering reptilian Ymir, scales gleaming green and black, rampages through an ancient cityscape clutching a screaming human in one massive claw while brandishing a broken lamppost like a weapon. Crowds scatter before the Colosseum as the alien creature — brought back from Venus aboard a doomed rocket — grows to monstrous proportions. This is peak Atomic Age monster panic rendered in vivid gouache pulp glory.