Book collector’s magazine goes in search of John W. Campbell and unknown worlds

The June 2010 issue of Firsts: The Book Collector’s Magazine features an intriguing article (“In Search of Unknown Worlds") about legendary science fiction & fantasy editor John W. Campbell and unknown worlds. Here’s the promotional blurb:

"During the 1930s, the magazine Weird Tales dominated fantasy and horror fiction. In 1939, a new and different magazine appeared in the field: Unknown (later Unknown Worlds). Under the leadership of John W. Campbell, who also edited Astounding Science-Fiction, the magazine propelled fantasy a quantum leap forward."

I’ve purchased single issues of Firsts in the past. Awesome magazine if you’ve never flipped through a copy.

Pictured: First issue of Unknown (March 1939)