There were 2 magazines published by Marvel with the title Haunt Of Horror.
The first one (this entry) was a taller-than-digest-sized effort containing prose horror fiction but no actual comics content, although it did feature spot illustrations with the stories. These were mostly reprinted material by top fantasy authors, with a few new stories and text articles mixed in.
The stories in these two issues are very good, even though two pages of Harlan Ellison's "Neon" were transposed in the first issue.
A third issue was advertised but never saw the light of day, probably due to low sales.