This book falls into the found footage (manuscript) genre: “In 2014, Jack Sparks - the controversial pop culture journalist - died in mysterious circumstances. This book, compiled from the files found after his death, reveals the chilling details of Jack’s final hours.” It tells the story of a gonzo journalist who was investigating the occult when he died. I read it in about a week (which is super fast for me) and it was pretty spooky. If I say much more I’ll spoil it for you, but if you like The Blair Witch Project1 and/or the Exorcist this may be up your alley. 
The creators of the Blair Witch Project even make a cameo appearance in the book.↩