I love a ghost story and am a big fan of Susan Hill as you will see from my reviews below. This is another good one, suitably creepy, and with a great deal of supense. My only quibble would be that I thought the end a little contrived, I really wanted to know the motivation for the incident, or perhaps some explanation as to why the person acted that way. I cannot say more without spoiling the ending.
If anyone has any ideas do let me know!