We are healthy only to the extent that our ideas are humane." So reads the tombstone of downtrodden writer Kilgore Trout, but we have no doubt who's really talking: his alter ego Kurt Vonnegut. Health versus sickness, humanity versus inhumanity--both sets of ideas bounce through this challenging and funny book. As with the rest of Vonnegut's pure fantasy, it lacks the shimmering, fact-fueled rage that illuminates Slaughterhouse-Five. At the same time, that makes this book perhaps more enjoyable...