Krypto: The Last Dog of Krypton #4

Krypto has made a new friend–another stray and together, the two of them are traveling across America. But they are not alone, for a monster from a distant world has come to Earth, and their two paths are now on a collision course. Krypto, with superpowers that are just coming in, must find a way to defend himself, his friend–and his planet.