Download or read book Supergirl (2011-) #7 written by Michael Green and published by DC. This book was released on with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: It's Supergirl versus the Worldkillers! But who are they, and where did they come from? What is their connection to Krypton? More important, can the Girl of Steel stop them before they make good on their names and destroy Earth?