Justice League Of America #21 Facsimile Edition Cover A Mike Sekowsky

THE JUSTICE LEAGUE AND JSA TEAM UP FOR THE FIRST TIME! Crisis on Earth-One! Witness history in the making as the Justice League of America teams up with the legendary Justice Society of America for the very first time! The two titanic teams will need all the muscle they can muster to take down the combined criminal cohorts of two Earths--the Crime Champions!