Superman #4

In this 1940 classic, Clark Kent dives into a mystery surrounding a military weapon capable of triggering artificial earthquakes—only to find himself racing against Lex Luthor, who’s determined to steal the plans at any cost. With the real Professor Martinson in danger and a phony version of the scientist playing a deadly game, Superman must uncover the truth before the weapon falls into the wrong hands.

In a whimsical 1940 tale from Superman #4, a young dog named Shorty can’t resist peeking into an artist’s studio, where a painted turkey seems too tempting to ignore. When the artist steps out, Shorty’s curiosity turns to hunger—only to find the turkey gone from the canvas and himself caught in the act.

In "Luthor's Undersea City," Superman confronts Lex Luthor as the villain unleashes a sinister plan, draining oil from wells worldwide before flooding the western U.S. coast to reveal a glass-enclosed city rising from the ocean's depths—its ancient, bizarre architecture a chilling testament to Luthor’s ambition. With Luthor’s henchmen scattered in the chaos, the Man of Steel must navigate the submerged metropolis before its hidden threat can fully emerge.

In "The Economic Enemy," Superman races across the country to stop a web of sabotage targeting America’s vital industries, spurred by the suicide of a man who believed a shadowy conspiracy was undermining the nation’s recovery. With the lives of Barney Calhoun and Paul Dorgan hanging in the balance, and the true architect of the chaos—J. F. Curtis—working in the shadows, Superman must unravel the plot before the economy collapses.

In "Terror in the Trucker's Union," Superman infiltrates a criminal syndicate led by Gus Snide, Nick, and Pete, who aim to seize control of the city's truck drivers' union and disrupt food distribution for profit. Disguised as a new recruit, he navigates the dangerous web of threats and deception, all while protecting the union's rightful leader, Carlson, and his daughter, Amy Carlson, from the gang's growing menace.