I am a complete wimp but my flesh did not creep, and the only thing I was haunted by after finishing this book was the sound of my brain going "Was that it? Where's my ending? Why do we now have a four page afterword by the author?" Also: "THIS COULD HAVE BEEN SO GOOD."
The afterword is presumably to pad out a novella which Hammer, for reasons known only to them, have padded out with great papery gaps either side of the writing. This is a novel that is slight in length but also very much in content.
I zoomed through this in a couple of hours thanks to the addictive single-string structure of following Isobel, but while I couldn't put it down, I was fundamentally unable to care for any of the characters either. None of the developed plot threads go anywhere, or build to anything more than a vague hint; and not a satisfyingly teasing hint either, more a hint of someone who has gone off in search of a digestive and forgotten to do anything more with it.
The back of the book is written rather amazingly like a Point Horror ("outside is a young man. A pilot. <new par> And he wants to come in..." - and I SWEAR I read that story in about 1993 - but this is the most nerve-shredding part of the book. The ghost himself seems to be a nice chap, which is all fine, there is an obligatorily unnerving landlady, but her potential for supreme creepiness is thrown away a few pages before the afterword.
The end of the book is so depressing in its lack of chill or satisfaction that the author's well-meaning list of influences in that bloody afterword serves more to remind you of what could have been, than what you've just read. On a positive note there were some great descriptions, and budding characters who sadly were never built on.