The Glass Floor

"The Glass Floor" is a short story by Stephen King, first published in the autumn 1967 issue of Startling Mystery Stories.
It was later republished (with some minor amendments) in issue #298 of Weird Tales in autumn 1990 and in issue #68 of Cemetery Dance in December 2012.
In 2020, it was published as part of the trade hardcover Best of Cemetery Dance 2.
In 2020, "The Glass Floor" was included in a deluxe edition of Night Shift published by Cemetery Dance Publications.