The Mammoth Book of Halloween Stories: Terrifying Tales Set on the Scariest Night of the Year! by Stephen Jones. (Skyhorse Publishing 2018)
Contents (via the ISFDb)
Introduction: When Churchyards Yawn • essay by Stephen Jones October in the Chair • (2002) • short story by Neil Gaiman Reflections in Black • short fiction by Steve Rasnic Tem The Halloween Monster • short fiction by Alison Littlewood The Phénakisticope of Decay • short fiction by James Ebersole Memories of Día de los Muertos • short story by Nancy Kilpatrick (variant of Memories of el Día de los Muertos 1993) Fragile Masks • short fiction by Richard Gavin Bone Fire • short fiction by Storm Constantine Queen of the Hunt • short fiction by Adrian Cole The October Widow • (2014) • short story by Angela Slatter Before the Parade Passes • short fiction by Marie O'Regan Her Face • short fiction by Ramsey Campbell A Man Totally Alone • short fiction by Robert Hood Bleed • (1995) • short story by Richard Christian Matheson The Utimate Halloween Party App • short fiction by Lisa Morton The Folding Man • (2010) • short story by Joe R. Lansdale I Wait for You • short fiction by Eygló Karlsdóttir? Dust Upon a Paper Eye • short fiction by Cate Gardner Not Our Brother • (1982) • novelette by Robert Silverberg The Scariest Thing in the World • short fiction by Michael Marshall Smith The Nature of the Beast • short fiction by Sharon Gosling The Beautiful Feast of the Valley • short fiction by Stephen Gallagher In the Year of Omens • (2014) • short story by Helen Marshall The Millennial's Guide to Death • short fiction by Scott Bradfield White Mare • short fiction by Thana Niveau Pumpkin Kids • short fiction by Robert Shearman Lantern Jack • (2011) • short story by Christopher Fowler Halloween Treats • poem by Jane Yolen
Blurb: Twenty-six terrifying tales set on the scariest night of the year! Treat yourself to some very tricky stories! Hallowe'en . . . All Hallows' Eve . . . Samhain . . . Día de Muertos . . . the Day the Dead Come Back . . . When the barriers between the worlds are at their weakest, and ghosts and grisly things can cross over into our existence, then for a short period each year, the natural becomes the supernatural, and nobody is safe from their most intimate and terrifying fears. The Mammoth Book of Halloween Stories brings you a dark feast of frightening fiction by some of the most successful and respected and horror writers working today, including Ramsey Campbell, Neil Gaiman, Joe R. Lansdale, Helen Marshall, Richard Christian Matheson, Robert Shearman, Robert Silverberg, Angela Slatter, Steve Rasnic Tem, and many more, along with a very special contribution by award-winning poet Jane Yolen. Here you will encounter witches, ghosts, monsters, psychos, demonic nuns, and even Death himself in this spooky selection of stories set on the night when evil walks the earth . . .
Any info on the "demonic nuns"?
From the first, I set myself against "literature"; the story was the thing, and no amount of style could persuade me to select a story that lacked genuine, unadulterated horror. For those who wanted something high-brow there was plenty.