Each issue of the Canadian edition corresponded to one issue of either "Astonishing" or "Super Science": for example, the first two Canadian issues drew their contents from the February 1942 "Super Science Stories" and the June 1942 "Astonishing", respectively. This pattern continued for ten issues. The next issue, dated April 1944, contained several reprints from the US editions, but also included two original stories that had not appeared anywhere before—these had been acquired for the US magazine and remained in inventory. A total of eleven of these original stories appeared in the Canadian "Super Science Stories". Later issues of the magazine also saw many reprints from "Famous Fantastic Mysteries"; in tacit acknowledgment of the new source of material, the title was changed to "Super Science and Fantastic Stories" from the December 1944 issue. The artwork was mostly taken from Popular's US magazines but some new art appeared, probably by Canadian artists. There was no other Canadian presence: the letters page, for example, contained letters from the US edition.