Justice League of America #21 Facsimile Edition 2025

Trapped in their headquarters -- imprisoned by a team of master villains -- the Justice League Of America turns to the Justice Society Of America for Help!  In turn, the Justice Society will use the assistance of the Justice League in this strange game of turnabout in two worlds!  Never before have both bands of super-heroes met -- but never before has there been such a ...Crisis On Earth-One!