Adventure Comics #397

This September 1970 issue puts Supergirl front and center in a wonderfully charming cover by Mike Sekowsky and Dick Giordano, showing her lounging on the floor surrounded by fan-submitted costume design sketches — everything from a pantsuit look to variations on her classic uniform — while she muses that readers have sent in so many great ideas she simply can't choose. The cover teases a reader-participation costume contest alongside a story pitting Supergirl and two mystery guests against the villain Zond, who apparently stalks Stanhope Campus. It's a playful, fan-forward issue that captures DC's lively connection with its audience in the early 1970s.