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Cover of Challengers of the Unknown #21 — Photo: listing on reececomics

CATALOG RECORD

Challengers of the Unknown #21

DC · Series began 1958 · August-September 1961

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Dates

Cover date: August-September 1961
On sale: June 13, 1961
Pages: 36

Editions and covers

Original edition
Source ↗

Creators

pencils: Bob Brown, Henry Boltinoffinks: Bob Brown, Henry Boltinoffletters: Ira Schnapp, Stan Starkman, Henry Boltinoffscript: Henry Boltinoff

Stories

The Weird World That Didn't Exist · 11.67 pages
Mad Monarch of Burning Mountain · 1 pages
The Challengers' Space-Pet Ally · 12.67 pages

Reprinted in

Showcase Presents Challengers of the Unknown (2006)