Trapped In A

Four kids. One building. Rooms with rules. Something in the halls that knows when you break them. Each Trapped In A book locks a different group of kids inside a different building that goes way too deep, stays open way too late, and has rules scratched into the walls by people who came through before. The only way out is through every room. The only way through is together. And whatever lives in the walls doesn't care that you didn't read the warnings.