True or not, that story simply by itself and the paraphenalia to go with it is eery. If he spent as much time as he did composing that story, kudos to him, scared my colon clean.
As fot the truth behind it, I consider myslef an intelligent person, and to slough off the idea that there are no such things as spirits, trapped souls, etc. would be plain old ignorant. Just because they cannot be seen, does not mean that they do not exist. I've never had an experience, but I'm open to it, mind you not open enough to have bid on the box...