Wow, there's a lot going on in this book! It's like reading several books at once. There's post-war Britain, cold war and communism, madness and apocalyptic ponderings.
At the end I was left feeling mostly confused, like I must have missed the part where the author explained the whole thing. After reading the first four books very quickly, this was not the conclusion I was expecting.
I wouldn't say that I'm dissappointed with the book either, it had many interesting ideas and thoughts plus a rather dark view of the possible future of humankind. It was, however, a bit too cryptic for my taste. The author uses a lot of uncompleted sentences and other broken grammar structures to portray the way the characters think. Most of the time this just left me feeling frustrated, like there was something that they wanted to say but they never really said it. Or maybe I just missed the point completely?