The book was great, to begin with, you could tell the author had done thorough research into old houses and such. However, as the book progressed it became boring and predictable. The occurrences were minimum and it could hardly be called a ghost story.
Kinda Spoilers ahead:
The ending was terrible, it didn't explain much and saying as little as I can to not give away the ending, it didn't suit the book at all.
I would only recommend it if you have it and have it and only need something to fill your time. Peter James is not an author I will be returning to.