The Hidden World
Publisher: Palmer Publications, Inc.
Editor: Raymond A. Palmer as Ray Palmer
Frequency: Quarterly
Issues: 16 (#1 verified, other issues referenced on-line); Spring 1961 to Winter 1964. According to SFE3, the "Winter 1964" issue was in fact released in 1966.
Price: $1.50
Note: A magazine dedicated to the "Shaver mystery". The format of issue #1 is that of a trimmed pulp magazine, but the contents and the high price make it look more like a book. All stories and essays in issue #1 were written either by Shaver alone or in collaboration with Palmer. Palmer added very extensive footnotes to the reprint of "I Remember Lemuria!" published in issue #1 and was credited as a collaborator.
No titles found in this series.