This is the same Susan Hill who wrote The Woman in Black, so you can expect a good, scary, old-fashioned ghost story. I bought this from the Red Cross shop, and read it a while ago, before seeing the film version of The Woman in Black. My review of the film is here.
The Man in the Picture is also about supernatural revenge, mediated through a picture, with a sense of gathering oppression that doesn’t let up. It has the quality of a nightmare. Very satisfying.