Argumento
Collects Showcase (1956-1978) #6-7, 11-12 and Challengers of the Unknown (1958-1978 DC 1st Series) #1-8.
At last, DC collects Jack Kirby's run of adventure epics in a single paperback volume! These are the tales that introduced Ace Morgan, Red Ryan, Rocky Davis and Professor Haley - four men living on borrowed time, determined to face - and overcome - adversity in the form of monsters, aliens and would-be world conquerors!