Collecting JUSTICE LEAGUE OF AMERICA #122-124, #135-137 and #147-148! In this latest collection of team-ups, meet the heroes of Earth-S, led by the Earth's Mightiest Mortal, Captain Marvel, as well as the Legion of Super-Heroes!

The greatest threat to the peace and stability of the galaxy in centuries has ended thanks to the legion of super-heroes. Now, the United Planets must reaffirm control over a devastated population, and the ideal situation is to make the legion an officially sanctioned peace-keeping force. Still financially and emotionally reeling from the tragic