Plot
Collects Showcase (1956-1978) #6-7 and 11-12, and Challengers of the Unknown (1958-1978 DC 1st Series) #1-2.
Four years before Jack Kirby and Stan Lee created Marvel's Fantastic Four, there was another adventurous foursome co-created by Kirby that set fourth to challenge the unknown. Now witness those early adventures again in a specially priced hardcover volume collecting stories that were originally published in 1957-1958