The Heap is the name of several fictional comic book muck-monsters, the original of which first appeared in Hillman Periodicals' Air Fighters Comics #3, during the period fans and historians call the Golden Age of Comic Books. The Heap was comics' first swamp monster.

Skywald Publications was an American publisher of black-and-white comics magazines, primarily the horror anthologies Nightmare, Psycho, and Scream. It also published a small line of comic books and other genre magazines. Skywald's original comics were similar in appearance and quality to rival black-and-white publisher Warren Publishing, and even employed many of the same creators. Skywald operated from 1970 to 1975.