The Haunting of Gallagher Hotel by K.T. Rose

Some hotels check you in. This one cuts you off from the world entirely.
Riley takes a one-night serving job at an elite party inside the infamous Gallagher Hotel to quiet her grief — six years after losing her son. The guests are abysmal, but the night unfolds without a hitch. Until midnight.
That's when outside disappears.
No streets. No sky. Nothing. Beyond the porch steps there is only an endless black void. Riley and the other guests haven't just been sealed inside a haunted hotel — they've been plunged into purgatory, trapped with a dangerous demonic entity.
Alongside Chris — a thief with his own skeletons — Riley has to find a way back to Holloway before the hotel reaches its final destination. Will they escape the walls that feed on guilt, grief, and dark secrets — or become part of what the hotel consumes?
The Haunting of Gallagher Hotel is a supernatural horror novel inspired by a real, infamous haunted hotel — where the past doesn't haunt you so much as it consumes you. Perfect for fans of atmospheric dread, morally complex characters, and horror that hits you somewhere personal.