What is the author's style in Fates Worse Than Death by Kurt Vonnegut?

Fates Worse Than Death: An Autobiographical Collage consists of a rather breezy, pro-forma Preface, twenty-one numbered but untitled chapters and an Appendix consisting of nine documents and photographs, "segregated" from the text in order not to slow the narrative. As the subtitle suggests, the bulk of the text consists of previously published or delivered articles, book prefaces, speeches and sermons, extended pieces enclosed in quotation marks. These are turned into a collage by snippets of autobiographical memories and/or set-ups to how Vonnegut came to write or deliver the piece.