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This is an ISFDB Bibliographic Comments page for the Unknown series. This page may be used for a list of the titles in the series, bibliographic comments or extended notes about the series, or discussion on how to organize and/or record the works in the series. The link above leads to the ISFDB series record for Unknown. To discuss what should go on this page, use the talk page.

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Unknown, which also went by the titles Unknown Fantasy Fiction (Feb 1940 - Aug 1941), and Unknown Worlds (Oct 1941 -Oct 1943), was the fantasy companion to Astounding. It was edited by John W. Campbell, Jr. for its entire print run (1939-1943).

Despite its short life, Unknown was highly praised, even though a later attempt in 1948 to revive the magazine failed. The later Galaxy fantasy companion, Beyond Fantasy Fiction was an imitator of the magazine; a number of anthologies gleaned from Unknown were published: The Unknown, The Unknown Five, and Hell Hath Fury.


1943 - Feb - Apr - Jun - Aug - Oct - -
1942 - Feb - Apr - Jun - Aug - Oct - Dec
1941 - Feb - Apr - Jun - Aug - Oct - Dec
1940 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1939 - - Mar Apr May Jun Jul Aug Sep Oct Nov Dec


All of the Unknown data was supplied by John Boston (

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