The CRISIS begins here! The much-demanded early Crisis Crossover stories are finally collected featuring the Justice League of America (Earth-One) meeting their Golden Age predecessors the Justice Society of America (Earth-Two)! This volume collects the first four 2-part Crisis Crossover adventures reprinting JUSTICE LEAGUE OF AMERICA #21-22 29-30 37-38 and 46-47. Our heroes battle the Injustice Society the Crime Syndicate of Earth-Three the evil Johnny Thunder and the Anti-Matter Man!