Creatures from Planet X!

In This Digital Book, The World's Finest Heroes, Superman And Green Lantern, In One Amazing Adventure! When Cape And Ring Team Up, No Problem Is Too Big For These Friends To Fight. But When A Swarm Of Unearthly Beings Strike Earth, Superman And Green Lantern Will Be Fighting For Their Lives As They Take On The Creatures From Planet X! A Perfect Chapter Book For Any Young Super Hero Fan.