Why it's Hot:
- First meeting of the Justice Society of America and the Justice League of America
- First meeting of Green Arrow and Black Canary
- First meeting and team-up of Alan Scott, the Golden Age Green Lantern and Hal Jordan, the Silver Age Green Lantern
- 1st appearance of Dr. Fate and Hourman in the Silver Age
- 2nd appearance of Chronos
Synopsis:
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!
