The JSA is called upon once again to save the planet from malevolent forces that threaten the very fiber of the Universe! But this time it's personal as the foe they are fighting is a darkness-consumed Obsidian ù son of Alan Scott Sentinel. If that weren't enough they must also confront the return of the Injustice Society and face the time-shattering threat of Extant! This trade paperback reprints JSA #6-15.