Adventure Comics #382

This July 1969 issue of Adventure Comics puts Supergirl front and center in a striking cover by Curt Swan and Neal Adams, where a menacing Superman swoops down to bar her from the Fortress of Solitude — its giant golden key exploding as he declares the place strictly off-limits to her. The featured story, "The Super-Team's Split-Up!", promises real tension between DC's two Kryptonian cousins, brought to life inside by writer Cary Bates and artist Kurt Schaffenberger. It's a wonderfully dramatic slice of late-Silver Age storytelling that captures an era when even Superman could be a surprising obstacle for the Maid of Might.