What kind of story genre is this?

Ive been reading this story off creepypasta websites cause i love these fictional stories and horror ones like it but id like to find books like these but im not sure what to look for. My faves are stories like ones where people are psychotically trapped in there houses/apartments exactly like the one on this link http://www.creepypasta.com/psychosis/#more-486 any suggestions on chapter book?