
Horrorstör A novel by Grady Hendrix
"Horrorstör is a 2014 horror comedy novel written by Grady Hendrix and illustrated by Michael Rogalski. The novel was released in paperback on September 23, 2014, through Quirk Books and is set in ORSK, an IKEA-esque store that has been experiencing supernatural phenomena."
It was a fun, scary, amusing read. I've enjoyed a few of his other books as well.