This was when horror started to try to gain respectability as a literary force; Kirby McCauley was King's editor and ambitious novels by folks like Peter Straub were bestsellers at the time. Certainly including Oates and Singer, two highly-lauded writers of mainstream literary fiction, didn't hurt. While Oates's contribution, "The Bingo Master," is well-written and has odd moments, Singer's "The Enemy" operates in that dreamtime of myth and fable, like an old Jewish legend that speaks of the timeless evil nature of man. Bloch's "The Night Before Christmas" is a snappy tale of vengeance complete with the type of pleasantly groan-inducing pun he's known for. Gene Wolfe, Davis Grubb, Robert Aickman, and Manly Wade Wellman contribute oblique, darkly fantastical tales that are powerfully imagined, original, and genre-broadening. Two of my favorites were Lisa Tuttle's "Where the Stones Grow" and Karl Edward Wagner's "Where the Summer Ends." I could go on and on about these stories, and still have a handful left to read.
The cornerstone here is, of course, Stephen King's novella "The Mist," which appeared, slightly changed in the final sentences (which do nothing to the plot), in his Skeleton Crew (1985). The morning after a violent thunderstorm, a glowing wall of white mist creeps across and envelopes a rural Maine town. There are things in the mist. Things from a madman's prehistoric nightmare. Like a classic Twilight Zone episode it forces common people to bond against an uncommon enemy. As the lead story, its famously ambiguous ending seems to affect the rest of the stories in Dark Forces, as if tendrils of that mist drifted throughout them.
As for the paperback cover at the top (Bantam Dec 1981), I assume that the mesmerized woman is gazing off into that mist, although if she is expecting any sort of transcendence or transformation, she is going to be sorely disappointed. Snipped in half or burnt by acid or eaten alive, too. So, you know, look out, lady.
25th anniversary limited edition from Lonely Road Books