Reader, beware this book. It's short and small. It fits into your pocket and you can read it at leisure in any public place or alone at night. It looks like so many other books. You may think that, if the author's any good, the story will help you escape the world around you; you can drift into another place, better or worse, according to your mood. This is precisely the danger. Do not trust appearances; below these black printed words, spread page over page, lies a vision of the world that'll alarm the majority, revolt the sensitive and obliterate the prudish.