I could add to the volumes of literary criticism that fills the reviews of Slaughterhouse Five, but what's the point of that?
Rather, I will recommend that you hear the book as an audiobook - the book's a stream of consciuosness, disjointed approach works very well on tape. The reader shifts from one scene to another as easily as Billy Pilgrim does. The version I heard was not the one available here. Mine was narrated by Jose Ferrer and he did a wonderful job. Too bad Ferrer has passed on.