Series:Great Science Fiction

Titles
Publisher: Ultimate Publishing Co.

Editor: Sol Cohen, uncredited. At least two issues [#10 and 11] credited Harry Harrison as the editor, even though Cohen continued to select the stories and compile the issues.

Issues: 21

Binding: Digest

Issues
Note on dates: According to Mike Ashley's Transformations, the first seven issues have issue numbers only and the issues after that have seasons stated beginning with Fall 1967. Publication dates for all issues were taken from Ray Wysocki's Science Fiction, Fantasy, Weird Hero Magazine Checklist and reconciled with Science Fiction, Fantasy, & Weird Fiction Magazine Index: 1890-2006 by Stephen T. Miller & William G. Contento.