The User's Guide and Preface includes a key to the references within the text and in the footnotes along with other information likely to be helpful to serious readers. In this volume, the central topics are treated by formulating questions and answering them straightforwardly. Within the reply to each question, the main line of the response is in the numbered paragraphs, while secondary points are in unnumbered paragraphs and appear in slightly smaller type. Within the numbered paragraphs, the statements central to the response are in bold type. Most chapters also include appendices, in which interesting but nonessential matters are treated.