Action Comics #409

This February 1972 issue of Action Comics opens with one of the more unsettling covers of the era: a terrified Clark Kent collapses to the ground, desperately warning Superman — standing protectively over him — that his killer is someone even the Man of Steel can't stop. Nick Cardy's cover art captures the raw panic on Kent's face and the grim resolve in Superman's stance with remarkable expressiveness. Packed with 52 big pages for just 25 cents, the issue also promises "The Baffling Block of Metropolis" and a tale from the Secret Files of the Teen Titans, making it a genuinely generous read.