Superman investigates a possible conspiracy behind a mine collapse that may be deeper than the mine itself. This is a Superman-only issue.
Written By:
Jerry Siegel, Russell Cole, Gardner Fox, Dick Lawlor
Pencils:
Homer Fleming, Fred Guardineer, Russell Cole, Joe Shuster, Sven Elven, Will Ely, Bernard Baily, Vin Sullivan
Inks:
Homer Fleming, Fred Guardineer, Russell Cole, Joe Shuster, Sven Elven, Will Ely, Bernard Baily, Vin Sullivan
Cover By:
Lee O'Mealia
