2. The dates given in the text are for the issues of Astounding Science Fiction in which the stories appeared—except, of course, when some other magazine is named. 3. Other important stories dealing ...

"Sidewise in Time" isn't the first story to feature parallel worlds, but it does bring the concept to a pulp science fiction audience when the story is published in Astounding Stories in 1934.

the high degree of independence most science-fiction readers feel they have on their jobs might be one reason why so many of them say that they are either very happy or at least satisfied with their ...