"Supergirl based on characters created by Jerry Siegel and Joe Shuster by special arrangement with Jerry Siegel family."
Summary
"How did Supergirl become one of the Earth's greatest super heroes? Discover the story behind Kara Danvers' journey from Superman's kid cousin to full-fledged Justice League member, including the source of her out-of-this-world superpowers"-- Provided by publisher.