I bought this because it was number two in the masterworks series, which has been a goldmine of excellent science fiction: Gateway, Forever War etc.
I was a little dubious about reading a vampire book. I went through a bit of a phase as a teenager, and it had all been a bit cheesy and romanticised, more about the costumes than horror. I also read Dracula many years ago and was decidedly underwhelmed. This, was however, unexpectedly excellent.
Reading this novel is a little like being locked inside the main characters small shuttered house, with occasional forays into the sunlit world outside. This is because at first the only knowledge of the world you have is through his fear, and his hatred of the vampires; but gradually this is added to by his recollections of the past, of his realisations about the world he is now living in. This mirroring between the reader's knowledge and the main character's world is an excellent method of creating empathy with a character with whom you are not always meant to agree, but are at least expected to comprehend his choices.
The vampires of this world are not a mythical, and mysterious creation, but a scientific fact and undeniable truth in John Neville's world. This makes them both more frightening and more sympathetic, because regardless of their present situation and their needs they were once people. The question the book ultimately poses is what is it that makes us human?