Marvel Mystery Comics #21

In "The Idol of Death," Prince Itor seeks the ancient artifact to claim the power of the pharaohs, while gangster Crowley has his own plans—selling it for profit. The race for the idol begins as both men move toward a fate tied to its mysterious legacy.

In "The Magnetic Lake Mystery," the Sub-Mariner teams up with Betty to uncover a sabotage ring targeting American airlines, leading them to a Nazi operative with a dangerous scheme to seize control of the nation's skies. Written by a team from the era and illustrated with period-accurate flair, the story blends espionage and aerial intrigue in a taut, early superhero mystery.

In "The Case of the Transport Crashes!", Terry takes to the skies with his radio-controlled model plane to uncover the truth behind five unexplained airplane crashes—venturing into the air itself to solve a mystery that’s grounded the nation’s aviation.

In this 1941 jungle adventure from *Marvel Mystery Comics* #21, Ka-Zar fights to protect the African wilderness as he clashes with a column of Italian tanks advancing through the dense jungle from Kenya—caught between the Allied push and the brutal machinery of fascism.

In "The Sabotaged Schoolhouse," Senator Reeves and his committee arrive in a seacoast city to investigate the sudden collapse of a school, but the Vision is already there—uncovering the dangerous negligence behind the disaster before they can. With the truth buried in flawed blueprints and hidden corruption, the hero races to expose those who put lives at risk.