Justice League of America #30

In "The Most Dangerous Earth of All!", the Justice League of America faces their most dangerous challenge yet when the Crime Syndicate of America hijacks the JSA’s dimensional journey, trapping them in an interdimensional prison. With Earth-2 at stake, the JLA must confront their evil counterparts in a battle that pushes both teams to their limits. Written by Gardner Fox and illustrated by Mike Sekowsky, with inks by Bernard Sachs and lettering by Milt Snapinn, the issue’s cover by Mike Sekowsky and Murphy Anderson captures the tension of a universe teetering on the edge.