Horrorstör by Grady Hendrix.
Something strange is happening at the Orsk furniture superstore in Cleveland, Ohio. Every morning, employees arrive to find broken Kjerring wardrobes, shattered Brooka glassware and vandalized Liripip sofa beds—clearly, someone or something is up to no good. To unravel the mystery, five young employees volunteer for a long dusk-till-dawn shift—and they encounter horrors that defy imagination.
A traditional haunted house story in the form of a retail catalog.
Um. I think that defines amazeballs.