"Showcase #99 (DC Comics April 1978) FN VF 3rd Solo Power Girl KEY" is a vintage comic book from the Bronze Age featuring the character Power Girl. Produced by DC Comics, this issue showcases a solo adventure of Power Girl with appearances from characters like Green Lantern (Alan Scott), The Flash (Jay Garrick), and Brain Wave. With artwork by Joe Staton and Dick Giordano, this comic is a valuable addition to any comic book collection for fans of superheroes and US Comics.