Kill Creek by Scott Thomas
An internet promoter of the thriller genre gets four popular writers together at an old abandoned house (said to be haunted) for an interview to boost ratings. Their lives are not the same after the visit to the house. The only way for the authors to remain sane appears to return to the house and find out why a third floor bedroom had been bricked off all those years.
A creepy haunted house story that would be great to read on Halloween.