This is the second book of Vonnegut I've read, the first one being Vonnegut's best know novel, "Slaughterhouse 5". If it was not for "Slaughterhouse 5" I would take "A cat's cradle" as a very imaginative, weird and funny book, but probably not one that keeps me thinking for some time once finished. The tone is just too light and the story too improbable to be taken otherwise. But this is highly deceptive and once you realise that Vonnegut's war experience in Dresden has been central to his vision of life, this book appears not just as light entertainment but as a more profound reflection on the meaning of life (pretty meaningless in the author's view I gather) and, incidentally, on the role of religion and the power science gives to some very irresponsible and unbalanced people (this book was written during the cold war and the possibility of the world being completely wiped out by nuclear war was then seen as very real).
The message may be too pessimistic to make the novel completely enjoyable but it makes for an interesting and very funny read until someone presses the wrong the button.