Justice League of America #40
In "Indestructible Creatures of Nightmare Island!", the Justice League of America faces a terrifying mystery when a peace machine built by inventor Andrew Helm spirals into chaos, unleashing nightmarish illusions drawn from the heroes' deepest fears. Written by Gardner Fox and illustrated by Mike Sekowsky, with inks by Bernard Sachs and lettering by Gaspar Saladino, this 1965 classic sees the team confronting psychological horrors they can't touch—until they track the source back to the malfunctioning device. The cover by Mike Sekowsky and Murphy Anderson captures the eerie tension of the island's waking nightmare.
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Andrew Helm creates a machine intended to create world peace, but which malfunctions and causes evil. The Justice League of America traces the source of the mayhem, battles illusory creatures summoned from their subconscious minds, and turns off the malfunctioning machine.
Plot details indexed by the Grand Comics Database (CC BY-SA).