Nyoka the Jungle Girl #15

Charlton's fearless heroine is front and center in this 1956 installment, with cover art by Maurice Whitman placing Nyoka — in her leopard-print outfit and knife raised high — in a breathtaking underwater struggle atop a thrashing shark, while an unconscious figure in blue denim drifts helplessly nearby. It's a vivid snapshot of the kind of pulse-quickening peril that made Nyoka the Jungle Girl such a compelling read in mid-1950s adventure comics. With "The Mission of Mystery: Land of Danger" on the inside, this issue promises exactly the sort of action-packed thrills the cover so confidently delivers.