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At last, DC collects Jack Kirby's run of adventure epics from SHOWCASE #6, 7, 11 and 12 and CHALLENGERS OF THE UNKNOWN #1-8 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!

Author/Artist: Jack Kirby
Publisher: DC Comics
Pages: 320pp
Size: 7 x 10
Notes: softcover, color
Release Date: November 22, 2017
ISBN: 978-1401277192