Roald Dahl's Book of Ghost Stories

To be honest, I thought this book was going to be all ghost stories written BY Roald Dahl. Sadly, I was mistaken. (It was my own fault for not reading the blurb properly) But as I read the introduction, I got more excited. Dahl explains that he was supposed to adapt some of the stories in the book for TV show. Unfortunately, the pilot wasn't approved. He still kept all the short stories and compiled into this book.
Now onto the stories themselves. I was promised stories that would “give you the creeps and disturb your thoughts” and I personally feel as if I didn't get that. Most of the stories were extremely predictable and not at all creepy. I found that the first two or three were quite good but from then on the stories seemed to drag for pages and pages unnecesarilly. I felt like abandoning the whole thing a couple of times and I did fall asleep while reading some of them (which I never do).
I feel bad for the low rating but out of the 14 stories in the book, I think I only liked 5 of them.