Zone! A S.T.A.R. Labs scientist used his interdimensional portal device to free the Kryptonian criminal. Supergirl and Batgirl jump into action to contain him, but during the struggle, the portal tech is damaged. It activates. It pulls the Super-Villain, his accomplice, and the Super Heroes into zones unknown! Can the two friends work their way through the weird, wild dimensions and send General Zod back to his prison? Find out in this action-packed, illustrated chapter book that's perfect for young DC Super Hero fans!