Vonnegut has taken great care to date precisely various incidents and stages in the life of Billy Pilgrim [in Slaughterhouse-Five] and just as much care to date the appearances and intrusions of the narrator, who insists on at least a partial identification with Billy and becomes himself a character in the novel. Ultimately this observation leads to the realization that imbedded in the telegraphic, schizophrenic manner of the tale is a considerably detailed biography of Billy Pilgrim and that time-travel, together with the other science-fiction components of the novel, is a brilliant psychological technique devised by Vonnegut to interpret the life and philosophy of his created character. (p. 71)

Perhaps I attach too much importance to Vonnegut's biographical accuracy, but I have reason to believe that one's comprehension of the meaning and the aesthetic form of the novel may depend to a great extent on the isolation of Billy's...