When he began writing in the early 1950s, his obsessions were too weird for mainstream fiction.

But the quality of his writing, in particular his ability to describe the struggles of downtrodden people, had also gained him a wide reputation in mainstream fiction.

About half the content of the magazine was devoted to supernatural fiction; the rest to mainstream fiction.

He wanted to expand his range as a writer beyond poetry and mainstream fiction.

Slipstream falls between speculative fiction and mainstream fiction.