In spite of the psychologists’ reports, I’m very hesitant to count the Big Book of Granny among the “real” red flags. First of all, Adam didn’t write it alone, and while I’m aware that the other boy started having issues of his own later in life, there’s no information that those issues included violent crime (it sounds more like substance abuse and drunk driving; more on this here). And secondly, none of the descriptions of violence in the story were realistic and graphic enough to be disturbing. It was definitely not what I would expect to be summarized as “a very dramatic text, filled with images and narrative relating child murder, cannibalism, and taxidermy”. At the very least, I would expect something in the vein of Luke Woodham’s note about killing his dog (albeit involving children instead of a dog), not something ten-year-old me would have considered funny if one of my classmates wrote it.