Collecting Showcase Presents #6, 7, 11, 12 and Challengers of the Unknown
#1-18 (1957-1959)! Relive the classic Silver Age adventures of Jack Kirby's
Challengers of the Unknown - a team brought together by fate dedicated to a life
of harrowing adventure in the name of good!
- ISBN10 1401210872
- ISBN13 9781401210878
- Publish Date 31 October 2006
- Publish Status Out of Print
- Out of Print 28 October 2021
- Publish Country US
- Imprint DC Comics
- Format Paperback
- Pages 540
- Language English