If you want a book, that will scare the living daylights out of you, read this book.....it should come with a health warning!
I read this book (against my mothers wishes) when I was a teenager. Now, after re reading it, It still scares me!!!
Based on, some would say, a true story/event.....It portrays a demonic possession of Regan, from the beginning, to the end of the possession. It is one of those books, that make the hairs on your neck stand to attention! Buy it now, read it, and then I dare you to get a good nights sleep.....! Best Horror book ever!!!