Makes me think of the Shining, yet is nothing like the Shining
I take that back... I am reminded of the end result of the Shining. Complete madness.
While neither of these films have anything similar in a backstory other they are both about authors. The Shining has the author go mad, and the other has a fraud investigator go mad after reading the works of the author.
These reverse similarities are how I arrived at my conclusion. Another similarity is the remoteness of the films, both in the middle of nowhere. If Sam Neil had been Sutter Cane instead, the movie would be extremely similar.