Neil Gaiman’s most recent collection of short stories are calculated to chill to the bone. The collection is appropriately titled Trigger Warning. Triggers, Gaiman says in the introduction, refer to “those images or words or ideas that drop like trapdoors beneath us, throwing us out of our safe, sane, world into a place much more dark and less welcoming.” So, beware. The book is chock full of stories that would do well at a summer camp for adults, sitting around the campfire, engaged in a friendly competition to frighten each other to jelly before bedtime.