Nothing like the book- not even the same story!!!!
This is NOTHING like the book. That the child's disappearance happens on Halloween is the only connection and it's his daughter, there is no son in the story.
They just took the title. Not since (Stephen King's) The Lawnmower Man have I seen a book so utterly butchered by Hollywood. What's worse is that book is actually really scary, I had to sleep with night light on the first night after I read it, and now we will never see an actual adaptation of Pay The Ghost. Why buy the rights to the original if all you want to do is make the same style of "vengeful ghost" movie Hollywood has been making for two decades now??