The Vermilion Recursion

An abandoned building. A door that was not there yesterday, painted the color of old blood. Three strangers are drawn to it for three different reasons, and none of them can explain why they cannot look away. Ethan Blackwell wants proof that the building killed his brother. Mara Whitlock wants to document it before someone else claims the story. Daniel Cross just wants to stop dreaming about a room he has never seen.
When they finally step through the door together, they find a single room, perfectly ordinary, and perfectly wrong. Because when they step out again, they are still inside it. Every hallway leads back. Every window shows the same gray light. Every version of the room is a little more theirs, and a little less real. As the loop tightens, the three of them begin to suspect that the door was never meant to let anyone out, only to let something in.