Think of Timequake, Kurt Vonnegut's 19th and last novel (or so he says), as a victory lap. It's a confident final trot 'round the track by one of the greats of postwar American literature. After 40 years of practice, Vonnegut's got his schtick down cold, and it's a pleasure--if a slightly tame one--to watch him go through his paces one more time.